Apache Tomcat JEE Compliant Servlet Container
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Known Exploited Apache Tomcat Vulnerabilities
The following Apache Tomcat vulnerabilities have been marked by CISA as Known to be Exploited by threat actors.
| Title | Description | Added |
|---|---|---|
| Apache Tomcat Missing Encryption of Sensitive Data Vulnerability |
Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. CVE-2026-34486 Exploit Probability: 42.6% |
August 4, 2026 |
| Apache Tomcat Path Equivalence Vulnerability |
Apache Tomcat contains a path equivalence vulnerability that allows a remote attacker to execute code, disclose information, or inject malicious content via a partial PUT request. CVE-2025-24813 Exploit Probability: 99.9% |
April 1, 2025 |
| Apache Tomcat Remote Code Execution Vulnerability |
Apache Tomcat contains an unspecified vulnerability that allows for remote code execution if JmxRemoteLifecycleListener is used and an attacker can reach Java Management Extension (JMX) ports. This CVE exists because this listener wasn't updated for consistency with the Oracle patched issues for CVE-2016-3427 which affected credential types. CVE-2016-8735 Exploit Probability: 90.3% |
May 12, 2023 |
| Apache Tomcat Remote Code Execution Vulnerability |
When running Apache Tomcat, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server. CVE-2017-12617 Exploit Probability: 100.0% |
March 25, 2022 |
| Apache Tomcat on Windows Remote Code Execution Vulnerability |
When running Apache Tomcat on Windows with HTTP PUTs enabled, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server. CVE-2017-12615 Exploit Probability: 99.6% |
March 25, 2022 |
| Apache Tomcat Improper Privilege Management Vulnerability |
Apache Tomcat treats Apache JServ Protocol (AJP) connections as having higher trust than, for example, a similar HTTP connection. If such connections are available to an attacker, they can be exploited. CVE-2020-1938 Exploit Probability: 99.3% |
March 3, 2022 |
Of the known exploited vulnerabilities above, 5 are in the top 1%, or the 99th percentile of the EPSS exploit probability rankings. The vulnerability CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability is in the top 5% of the currently known exploitable vulnerabilities.
EOL Dates
Ensure that you are using a supported version of Apache Tomcat. Here are some end of life, and end of support dates for Apache Tomcat.
| Release | EOL Date | Status |
|---|---|---|
| 11.0 | - |
Active
|
| 10.1 | - |
Active
|
| 10.0 | October 31, 2022 |
EOL
Apache Tomcat 10.0 became EOL in 2022. |
| 9.0 | March 31, 2027 |
Active
Apache Tomcat 9.0 will become EOL next year, in March 2027. |
| 8.5 | March 31, 2024 |
EOL
Apache Tomcat 8.5 became EOL in 2024. |
| 8.0 | June 30, 2018 |
EOL
Apache Tomcat 8.0 became EOL in 2018. |
| 7 | March 31, 2021 |
EOL
Apache Tomcat 7 became EOL in 2021. |
| 6 | December 31, 2016 |
EOL
Apache Tomcat 6 became EOL in 2016. |
| 5 | September 30, 2012 |
EOL
Apache Tomcat 5 became EOL in 2012. |
By the Year
In 2026 there have been 52 vulnerabilities in Apache Tomcat with an average score of 7.7 out of ten. Last year, in 2025 Tomcat had 17 security vulnerabilities published. That is, 35 more vulnerabilities have already been reported in 2026 as compared to last year. Last year, the average CVE base score was greater by 0.08
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 52 | 7.72 |
| 2025 | 17 | 7.79 |
| 2024 | 16 | 7.93 |
| 2023 | 13 | 6.87 |
| 2022 | 6 | 6.73 |
| 2021 | 8 | 6.84 |
| 2020 | 11 | 7.03 |
| 2019 | 6 | 7.03 |
| 2018 | 8 | 6.17 |
It may take a day or so for new Tomcat vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Apache Tomcat Security Vulnerabilities
Apache Tomcat WebSocket Message Smuggling via Length Parameter (before 11.0.26)
CVE-2026-87022
7.5 - High
- September 23, 2026
Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.
length manipulation
Apache Tomcat 9/10/11 HTTP2 Request Smuggling v9.0.118-121,10.1.55-59,11.0.22-25
CVE-2026-86350
9.1 - Critical
- September 23, 2026
Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
HTTP Request Smuggling
Apache Tomcat CLIENT_CERT auth bypass when soft fail disabled (v11.0.25)
CVE-2026-86248
9.8 - Critical
- September 23, 2026
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.25, from 10.1.22 through 10.1.59, from 9.0.92 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
authentification
Apache Tomcat WS Async Timeout DoS (v9.0.0.M19.0.121,10.1.0.M110.1.59,11.0.0-M111.0.25)
CVE-2026-79677
7.5 - High
- September 23, 2026
Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat allows a denial of service as a result of lost time outs for asynchronous WebSocket writes. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Missing Release of Resource after Effective Lifetime
Incomplete Cleanup CVE-2026-78437 in Apache Tomcat 9/10/11 before 9.0.122
CVE-2026-78437
7.3 - High
- September 23, 2026
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Insufficient Cleanup
Apache Tomcat AJP Thread Pinning DoS (pre11.0.26, pre10.1.60, pre9.0.122)
CVE-2026-78383
7.5 - High
- September 23, 2026
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Allocation of Resources Without Limits or Throttling
Apache Tomcat 9.0.x/10.x/11.x WebSocket Close DoS (Uncontrolled Resource)
CVE-2026-77791
7.5 - High
- September 23, 2026
Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack. This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Resource Exhaustion
Tomcat HTTP/2 Race Condition: Trailer Injection 8.5.59-11.0.25
CVE-2026-77762
8.1 - High
- September 23, 2026
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
Race Condition
Apache Tomcat HTTP/1.0 TE Request Smuggling behind RPS 8.5.x11.0.x
CVE-2026-77756
3.7 - Low
- September 23, 2026
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.47 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
HTTP Request Smuggling
Apache Tomcat Auth Bypass via Alternate Name for WebSocket Endpoints (v8-11)
CVE-2026-76183
9.8 - Critical
- September 23, 2026
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Authentication Bypass by Alternate Name
Improper Auth in Tomcat (Jakarta Auth) before 11.0.26
CVE-2026-75973
7.3 - High
- September 23, 2026
Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.
authentification
Apache Tomcat CRL Ignored in TLS (v11.x-11.0.25,10.x-10.1.58,9.x-9.0.121)
CVE-2026-73581
6.5 - Medium
- September 23, 2026
Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.59, 9.0.122, which fixes the issue.
Improper Check for Certificate Revocation
Apache Tomcat Insufficient Session Expiration CVE-2026-73180 (v11.0.25+,10.1.58+,9.0.121+)
CVE-2026-73180
6.8 - Medium
- August 25, 2026
Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Insufficient Session Expiration
Apache Tomcat HTTP/2 backlog leak exhaustion (<=9.0.120/10.1.57/11.0.24)
CVE-2026-68763
7.5 - High
- August 25, 2026
Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Resource Exhaustion
Improper Auth in Apache Tomcat DataSourceRealm before 11.0.25 (CVE-2026-68569)
CVE-2026-68569
8.1 - High
- August 25, 2026
Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
authentification
Apache Tomcat FORM Auth Bypass (v11.0.0-M1 to 11.0.24)
CVE-2026-68525
9.1 - Critical
- August 25, 2026
Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.
AuthZ
Apache Tomcat 8-11.0.24 Improper Auth via Role Alias (CVE-2026-66422)
CVE-2026-66422
8.1 - High
- August 25, 2026
Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole(). This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
AuthZ
Apache Tomcat 9/10/11 Off-by-one Error in Rewrite Valve [N] Flag (v<9.0.121)
CVE-2026-65927
7.5 - High
- August 25, 2026
Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.
off-by-five
Apache Tomcat DIGEST Auth Replay Window Bypass (<11.0.25)
CVE-2026-65905
9.8 - Critical
- August 25, 2026
Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST authenticated request with a nonceCount on the upper boundary of the replay window then that request is replayable once only while the associated nonceCount remains within the replay window. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.30 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Authentication Bypass by Capture-replay
Apache Tomcat Improper Input Validation (before 11.0.25/10.1.58/9.0.121)
CVE-2026-65637
9.8 - Critical
- August 25, 2026
Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Improper Input Validation
Apache Tomcat TOCTOU Race in Unix Domain Socket (v11.0.0-M111.0.24)
CVE-2026-65183
8.1 - High
- August 25, 2026
Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat when creating unix domain sockets allows an unauthorised local user to access the unix domain socket. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.42 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58, 9.0.121, which fixes the issue.
TOCTTOU
Apache Tomcat 8-11 Improper Access Control via Security Constraint Bypass
CVE-2026-65182
9.1 - Critical
- August 25, 2026
Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint bypass if a constraint for a longer path is specified before a more restrictive constraint for a shorter sub-path. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.25, 10.1.58, 9.0.121, which fixes the issue.
Authorization
Apache Tomcat WebSocket Chat URC, 9.0.89120; 10.1.2457; 11.0.0M2024
CVE-2026-66299
7.5 - High
- July 28, 2026
Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue. Users are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue.
Resource Exhaustion
Apache Tomcat EncryptInterceptor Insufficient Docs 7.0-11.0.23
CVE-2026-59084
9.1 - Critical
- July 14, 2026
Insufficient Technical Documentation vulnerability in Apache Tomcat since the requirements to securely configure the EncryptInterceptor were not clearly documented. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.13 through 9.0.119, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120 which fix the issue.
Incomplete Documentation
Apache Tomcat RewriteValve URL Decode Bypass <=11.0.23,<10.1.56,<9.0.119,<8.5.100
CVE-2026-59083
9.1 - Critical
- July 14, 2026
Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120, which fix the issue.
Hex Encoding
Apache Tomcat JNDIRealm GSSAPI Auth Bypass (11.0.4)
CVE-2026-55957
7.3 - High
- June 29, 2026
Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.
Missing Critical Step in Authentication
Apache Tomcat 11.0.22 Improper Auth: Default Servlet Ignores Constraints
CVE-2026-55956
6.5 - Medium
- June 29, 2026
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
AuthZ
Apache Tomcat Replay Auth via EncryptionInterceptor v8.5-11.x
CVE-2026-55955
6.5 - Medium
- June 29, 2026
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.
authentification
Apache Tomcat 11.0.22: Incorrect Control Flow Log Issue
CVE-2026-55276
9.1 - Critical
- June 29, 2026
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.
Always-Incorrect Control Flow Implementation
Apache Tomcat FFM CRL Error Condition Vulnerability (<=11.0.22,10.1.55,9.0.118)
CVE-2026-53434
9.1 - Critical
- June 29, 2026
Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M7 through 10.1.55, from 9.0.83 through 9.0.118. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fixes the issue.
Detection of Error Condition Without Action
Apache Tomcat Rewrite Valve OR Logic Bypass 8.5.100
CVE-2026-53404
7.3 - High
- June 29, 2026
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
Always-Incorrect Control Flow Implementation
Apache Tomcat (<=11.0.22) Basic XSS in Number Guess Example - CVE-2026-50229
CVE-2026-50229
6.1 - Medium
- June 29, 2026
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
Basic XSS
Apache Tomcat Flaw via Multiple HTTP Methods (pre-9.0.118/10.1.55/11.0.22)
CVE-2026-43515
9.1 - Critical
- May 12, 2026
Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
AuthZ
Apache Tomcat AJP Secret Timing Attack before 11.0.22 (10.1.55, 9.0.118)
CVE-2026-43514
3.7 - Low
- May 12, 2026
Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Observable Timing Discrepancy
LockOutRealm Case-Sensitivity Flaw in Tomcat 711 before Fix
CVE-2026-43513
7.5 - High
- May 12, 2026
Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Improper Handling of Case Sensitivity
Apache Tomcat Auth Bypass via Digest Auth (<=9.0.117, 10.1.54, 11.0.21)
CVE-2026-43512
9.8 - Critical
- May 12, 2026
DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
DEPRECATED: Authentication Bypass Issues
Apache Tomcat Improper Input Validation (v10-11.x)
CVE-2026-41293
9.8 - Critical
- May 12, 2026
Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.
Improper Input Validation
HTTP Auth Header Leakage via WebSocket Auth in Apache Tomcat (V7-11)
CVE-2026-42498
7.3 - High
- May 12, 2026
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
Information Disclosure
Apache Tomcat 11,10,9 Unbounded Resource Allocation VULN (fixed 11.0.22)
CVE-2026-41284
7.5 - High
- May 12, 2026
Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117. Older, unsupported versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.
Allocation of Resources Without Limits or Throttling
Apache Tomcat client cert auth bypass 9.x-11.x FFM disabled
CVE-2026-34500
6.5 - Medium
- April 09, 2026
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
authentification
Apache Tomcat 9/10/11 Logs Expose K8s Bearer Token
CVE-2026-34487
7.5 - High
- April 09, 2026
Insertion of Sensitive Information into Log File vulnerability in the cloud membership for clustering component of Apache Tomcat exposed the Kubernetes bearer token. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.13 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Insertion of Sensitive Information into Log File
Apache Tomcat Missing Encryption via EncryptInterceptor Bypass Fixed in 9.0.117
CVE-2026-34486
7.5 - High
- April 09, 2026
Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Missing Encryption of Sensitive Data
Apache Tomcat JsonAccessLogValve Encoding/escape Vulnerability (v9-10-11)
CVE-2026-34483
7.5 - High
- April 09, 2026
Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.
Output Sanitization
Apache Tomcat INI IMPUNVT CVE-2026-32990 Fix 9.0.116/10.1.53/11.0.20
CVE-2026-32990
5.3 - Medium
- April 09, 2026
Improper Input Validation vulnerability in Apache Tomcat due to an incomplete fix of CVE-2025-66614. This issue affects Apache Tomcat: from 11.0.15 through 11.0.19, from 10.1.50 through 10.1.52, from 9.0.113 through 9.0.115. Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Improper Input Validation
Tomcat EncryptInterceptor Padding Oracle (before 11.0.19)
CVE-2026-29146
7.5 - High
- April 09, 2026
Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.0.0-M1 through 10.1.52, from 9.0.13 through 9..115, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.19, 10.1.53 and 9.0.116, which fixes the issue.
Generation of Error Message Containing Sensitive Information
Clientcert auth ignores softfail in Apache Tomcat (11.0.18)
CVE-2026-29145
9.1 - Critical
- April 09, 2026
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13. Users are recommended to upgrade to version Tomcat Native 1.3.7 or 2.0.14 and Tomcat 11.0.20, 10.1.53 and 9.0.116, which fix the issue.
authentification
Cipher Order Not Preserved in Apache Tomcat 911 (pre9.0.116/10.1.53/11.0.20).
CVE-2026-29129
7.5 - High
- April 09, 2026
Configured cipher preference order not preserved vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.16 through 11.0.18, from 10.1.51 through 10.1.52, from 9.0.114 through 9.0.115. Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Use of a Broken or Risky Cryptographic Algorithm
Apache Tomcat 8.511 Open Redirect via LoadBalancerDrainingValve (11.0.18,10.1.52,9.0.115)
CVE-2026-25854
6.1 - Medium
- April 09, 2026
Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100. Other, unsupported versions may also be affected Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Open Redirect
Apache Tomcat HTTP Request Smuggling via Chunk Extension (pre 11.0.20)
CVE-2026-24880
7.5 - High
- April 09, 2026
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
HTTP Request Smuggling
Apache Tomcat Native&Tomcat: OCSP Validation Bypass 1.3.4/2.0.11
CVE-2026-24734
7.4 - High
- February 17, 2026
Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.
Improper Input Validation
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