Apache Traffic Server
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By the Year
In 2025 there have been 5 vulnerabilities in Apache Traffic Server. Last year, in 2024 Traffic Server had 8 security vulnerabilities published. If vulnerabilities keep coming in at the current rate, it appears that number of security vulnerabilities in Traffic Server in 2025 could surpass last years number.
Year | Vulnerabilities | Average Score |
---|---|---|
2025 | 5 | 0.00 |
2024 | 8 | 7.43 |
2023 | 8 | 7.70 |
2022 | 11 | 7.23 |
2021 | 14 | 7.87 |
2020 | 5 | 8.88 |
2019 | 10 | 7.40 |
2018 | 5 | 6.42 |
It may take a day or so for new Traffic Server vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Apache Traffic Server Security Vulnerabilities
Apache Traffic Server allows request smuggling if chunked messages are malformed
CVE-2024-53868
- April 03, 2025
Apache Traffic Server allows request smuggling if chunked messages are malformed. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4. Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.
HTTP Request Smuggling
Improper Access Control vulnerability in Apache Traffic Server
CVE-2024-56196
- March 06, 2025
Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 10.0.4, which fixes the issue.
Authorization
Improper Input Validation vulnerability in Apache Traffic Server
CVE-2024-38311
- March 06, 2025
Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 9.2.9 or 10.0.4, which fixes the issue.
Improper Input Validation
Improper Access Control vulnerability in Apache Traffic Server
CVE-2024-56195
- March 06, 2025
Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 9.2.9 or 10.0.4, which fixes the issue.
Authorization
Expected Behavior Violation vulnerability in Apache Traffic Server
CVE-2024-56202
- March 06, 2025
Expected Behavior Violation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to versions 9.2.9 or 10.0.4 or newer, which fixes the issue.
Expected Behavior Violation
Bluetooth Service Integer Overflow Vulnerability in Android
CVE-2018-9481
6.5 - Medium
- November 20, 2024
In bta_hd_set_report_act of bta_hd_act.cc, there is a possible out-of-bounds read due to an integer overflow. This could lead to remote information disclosure in the Bluetooth service with no additional execution privileges needed. User interaction is not needed for exploitation.
Integer Overflow or Wraparound
Improper Input Validation vulnerability in Apache Traffic Server
CVE-2024-38479
- November 14, 2024
Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.5. Users are recommended to upgrade to version 9.2.6, which fixes the issue, or 10.0.2, which does not have the issue.
Improper Input Validation
Apache Traffic Server: HTTP Header Parsing Vulnerability
CVE-2024-50305
- November 14, 2024
Valid Host header field can cause Apache Traffic Server to crash on some platforms. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.5. Users are recommended to upgrade to version 9.2.6, which fixes the issue, or 10.0.2, which does not have the issue.
Improper Input Validation
Apache Traffic Server Privilege Retention Vulnerability on Startup
CVE-2024-50306
- November 14, 2024
Unchecked return value can allow Apache Traffic Server to retain privileges on startup. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.5, from 10.0.0 through 10.0.1. Users are recommended to upgrade to version 9.2.6 or 10.0.2, which fixes the issue.
Unchecked Return Value
Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers
CVE-2023-38522
7.5 - High
- July 26, 2024
Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
HTTP Request Smuggling
Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers
CVE-2024-35161
7.5 - High
- July 26, 2024
Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
HTTP Request Smuggling
Invalid Accept-Encoding header can cause Apache Traffic Server to fail cache lookup and force forwarding requests
CVE-2024-35296
8.2 - High
- July 26, 2024
Invalid Accept-Encoding header can cause Apache Traffic Server to fail cache lookup and force forwarding requests. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
Improper Input Validation
HTTP/2 CONTINUATION DoS attack can cause Apache Traffic Server to consume more resources on the server
CVE-2024-31309
- April 10, 2024
HTTP/2 CONTINUATION DoS attack can cause Apache Traffic Server to consume more resources on the server. Version from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.3 are affected. Users can set a new setting (proxy.config.http2.max_continuation_frames_per_minute) to limit the number of CONTINUATION frames per minute. ATS does have a fixed amount of memory a request can use and ATS adheres to these limits in previous releases. Users are recommended to upgrade to versions 8.1.10 or 9.2.4 which fixes the issue.
Improper Input Validation
Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server:
CVE-2023-39456
7.5 - High
- October 17, 2023
Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2. Users are recommended to upgrade to version 9.2.3, which fixes the issue.
Improper Input Validation
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Traffic Server.This issue affects Apache Traffic Server:
CVE-2023-41752
7.5 - High
- October 17, 2023
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Traffic Server.This issue affects Apache Traffic Server: from 8.0.0 through 8.1.8, from 9.0.0 through 9.2.2. Users are recommended to upgrade to version 8.1.9 or 9.2.3, which fixes the issue.
Information Disclosure
The HTTP/2 protocol
CVE-2023-44487
7.5 - High
- October 10, 2023
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Resource Exhaustion
Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.
CVE-2023-33934
9.1 - Critical
- August 09, 2023
Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.
HTTP Request Smuggling
Improper input validation vulnerability on the range header in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.
CVE-2022-47185
7.5 - High
- August 09, 2023
Improper input validation vulnerability on the range header in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.
Improper Input Validation
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: 8.0.0 to 9.2.0.
CVE-2022-47184
7.5 - High
- June 14, 2023
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: 8.0.0 to 9.2.0.
Information Disclosure
Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server
CVE-2023-30631
7.5 - High
- June 14, 2023
Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server. The configuration option proxy.config.http.push_method_enabled didn't function. However, by default the PUSH method is blocked in the ip_allow configuration file.This issue affects Apache Traffic Server: from 8.0.0 through 9.2.0. 8.x users should upgrade to 8.1.7 or later versions 9.x users should upgrade to 9.2.1 or later versions
Improper Input Validation
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server:
CVE-2023-33933
7.5 - High
- June 14, 2023
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: from 8.0.0 through 9.2.0. 8.x users should upgrade to 8.1.7 or later versions 9.x users should upgrade to 9.2.1 or later versions
Information Disclosure
Improper Input Validation vulnerability for the xdebug plugin in Apache Software Foundation Apache Traffic Server
CVE-2022-40743
6.1 - Medium
- December 19, 2022
Improper Input Validation vulnerability for the xdebug plugin in Apache Software Foundation Apache Traffic Server can lead to cross site scripting and cache poisoning attacks.This issue affects Apache Traffic Server: 9.0.0 to 9.1.3. Users should upgrade to 9.1.4 or later versions.
XSS
Improper Check for Unusual or Exceptional Conditions vulnerability in handling the requests to Apache Traffic Server
CVE-2022-37392
5.3 - Medium
- December 19, 2022
Improper Check for Unusual or Exceptional Conditions vulnerability in handling the requests to Apache Traffic Server. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
Improper Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions vulnerability handling requests in Apache Traffic Server
CVE-2022-32749
7.5 - High
- December 19, 2022
Improper Check for Unusual or Exceptional Conditions vulnerability handling requests in Apache Traffic Server allows an attacker to crash the server under certain conditions. This issue affects Apache Traffic Server: from 8.0.0 through 9.1.3.
Improper Check for Unusual or Exceptional Conditions
Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to request secure resources
CVE-2021-37150
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to request secure resources. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
Improper Input Validation
Improper Input Validation vulnerability in HTTP/2 request validation of Apache Traffic Server
CVE-2022-25763
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in HTTP/2 request validation of Apache Traffic Server allows an attacker to create smuggle or cache poison attacks. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
HTTP Request Smuggling
Improper Input Validation vulnerability in HTTP/1.1 header parsing of Apache Traffic Server allows an attacker to send invalid headers
CVE-2022-28129
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in HTTP/1.1 header parsing of Apache Traffic Server allows an attacker to send invalid headers. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
Improper Input Validation
Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server
CVE-2022-31778
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.
Improper Input Validation
Improper Input Validation vulnerability in HTTP/2 header parsing of Apache Traffic Server allows an attacker to smuggle requests
CVE-2022-31779
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in HTTP/2 header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
Improper Input Validation
Improper Input Validation vulnerability in HTTP/2 frame handling of Apache Traffic Server allows an attacker to smuggle requests
CVE-2022-31780
7.5 - High
- August 10, 2022
Improper Input Validation vulnerability in HTTP/2 frame handling of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.
Improper Input Validation
Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests
CVE-2021-44040
7.5 - High
- March 23, 2022
Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.3 and 9.0.0 to 9.1.1.
Improper Input Validation
Improper Authentication vulnerability in TLS origin validation of Apache Traffic Server
CVE-2021-44759
8.1 - High
- March 23, 2022
Improper Authentication vulnerability in TLS origin validation of Apache Traffic Server allows an attacker to create a man in the middle attack. This issue affects Apache Traffic Server 8.0.0 to 8.1.0.
authentification
Improper Input Validation vulnerability in accepting socket connections in Apache Traffic Server
CVE-2021-41585
7.5 - High
- November 03, 2021
Improper Input Validation vulnerability in accepting socket connections in Apache Traffic Server allows an attacker to make the server stop accepting new connections. This issue affects Apache Traffic Server 5.0.0 to 9.1.0.
Improper Input Validation
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server
CVE-2021-43082
9.8 - Critical
- November 03, 2021
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker to overwrite memory. This issue affects Apache Traffic Server 9.1.0.
Classic Buffer Overflow
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests
CVE-2021-37147
7.5 - High
- November 03, 2021
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.
Improper Input Validation
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests
CVE-2021-37148
7.5 - High
- November 03, 2021
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.0.1.
Improper Input Validation
Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests
CVE-2021-37149
7.5 - High
- November 03, 2021
Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.
Improper Input Validation
Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle attacks
CVE-2021-38161
8.1 - High
- November 03, 2021
Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle attacks. This issue affects Apache Traffic Server 8.0.0 to 8.0.8.
authentification
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server
CVE-2021-32566
7.5 - High
- June 30, 2021
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Improper Input Validation
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server
CVE-2021-32567
7.5 - High
- June 30, 2021
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Improper Input Validation
Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server
CVE-2021-35474
9.8 - Critical
- June 30, 2021
Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Memory Corruption
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache
CVE-2021-27577
7.5 - High
- June 29, 2021
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
HTTP Request Smuggling
Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests
CVE-2021-32565
7.5 - High
- June 29, 2021
Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
HTTP Request Smuggling
Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.
CVE-2021-27737
7.5 - High
- May 14, 2021
Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.
ATS negative cache option is vulnerable to a cache poisoning attack
CVE-2020-17509
7.5 - High
- January 11, 2021
ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
HTTP Request Smuggling
The ATS ESI plugin has a memory disclosure vulnerability
CVE-2020-17508
7.5 - High
- January 11, 2021
The ATS ESI plugin has a memory disclosure vulnerability. If you are running the plugin please upgrade. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
Information Disclosure
Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames
CVE-2020-9494
7.5 - High
- June 24, 2020
Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread.
Buffer Overflow
Apache ATS 6.0.0 to 6.2.3
CVE-2020-9481
7.5 - High
- April 27, 2020
Apache ATS 6.0.0 to 6.2.3, 7.0.0 to 7.1.9, and 8.0.0 to 8.0.6 is vulnerable to a HTTP/2 slow read attack.
Resource Exhaustion
There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3
CVE-2019-17565
9.8 - Critical
- March 23, 2020
There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and chunked encoding. Upgrade to versions 7.1.9 and 8.0.6 or later versions.
HTTP Request Smuggling
There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3
CVE-2019-17559
9.8 - Critical
- March 23, 2020
There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and scheme parsing. Upgrade to versions 7.1.9 and 8.0.6 or later versions.
HTTP Request Smuggling
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