Tomcat EncryptInterceptor Padding Oracle (before 11.0.19)
CVE-2026-29146 Published on April 9, 2026

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default
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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-29146 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Types

Generation of Error Message Containing Sensitive Information

The software generates an error message that includes sensitive information about its environment, users, or associated data.

External Control of Critical State Data

The software stores security-critical state information about its users, or the software itself, in a location that is accessible to unauthorized actors.

Use of a Risky Cryptographic Primitive

This device implements a cryptographic algorithm using a non-standard or unproven cryptographic primitive.


Products Associated with CVE-2026-29146

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-29146 are published in these products:

Apache Tomcat
 
F5 Networks Tomcat
 
Red Hat Jboss Enterprise Web Server
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Enterprise Linux Eus
 
Red Hat Rhel E4s
 
Red Hat Rhel Tus
 
Red Hat Rhel Eus
 
Red Hat Rhel Els
 

Affected Versions

Apache Software Foundation Apache Tomcat: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10.0 Extended Update Support: Red Hat Enterprise Linux 10.0 Extended Update Support: Red Hat Enterprise Linux 7 Extended Lifecycle Support: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8.8 Telecommunications Update Service: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: Red Hat Enterprise Linux 9.6 Extended Update Support: Red Hat JBoss Web Server 6.2.3: Red Hat JBoss Web Server 6.2 on RHEL 10: Red Hat JBoss Web Server 6.2 on RHEL 8: Red Hat JBoss Web Server 6.2 on RHEL 9: Red Hat JBoss Web Server 7.0.0: Red Hat JBoss Web Server 7.0 on RHEL 10: Red Hat JBoss Web Server 7.0 on RHEL 8: Red Hat JBoss Web Server 7.0 on RHEL 9: Red Hat Enterprise Linux 6: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat JBoss Web Server 5:

Exploit Probability

EPSS
6.26%
Percentile
92.82%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.