GHSA-h468-7pvh-8vr8 BIT-tomcat-2026-29146 CVE-2026-29146
Apache Tomcat: Padding Oracle vulnerability in EncryptInterceptor
High
Maven
- Severity
- 0.0 / 10
- High · CVSS 4.0
- Exploit chance (EPSS)
- 8.85%
- Chance of exploitation in the next 30 days. Higher than 95.20% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-209 Generation of Error Message Containing Sensitive Information
- Fix
- Available
- 2 packages have a fixed version
Description
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.
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| org.apache.tomcat:tomcat | >= 9.0.13, < 9.0.116 |
9.0.116 |
| org.apache.tomcat:tomcat | >= 10.1.50, < 10.1.53 |
10.1.53 |
| org.apache.tomcat:tomcat | >= 11.0.0-M1, < 11.0.20 |
11.0.20 |
| org.apache.tomcat:tomcat | >= 8.5.38, <= 8.5.100 |
No fix yet |
| org.apache.tomcat:tomcat | >= 7.0.100, <= 7.0.109 |
No fix yet |
| org.apache.tomcat:tomcat-tribes | >= 9.0.13, < 9.0.116 |
9.0.116 |
| org.apache.tomcat:tomcat-tribes | >= 10.1.50, < 10.1.53 |
10.1.53 |
| org.apache.tomcat:tomcat-tribes | >= 11.0.0-M1, < 11.0.20 |
11.0.20 |
| org.apache.tomcat:tomcat-tribes | >= 8.5.38, <= 8.5.100 |
No fix yet |
| org.apache.tomcat:tomcat-tribes | >= 7.0.100, <= 7.0.109 |
No fix yet |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
org.apache.tomcat:tomcat Maven → 9.0.116
- maven
<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat</artifactId><version>9.0.116</version></dependency>- gradle
implementation("org.apache.tomcat:tomcat:9.0.116")
org.apache.tomcat:tomcat-tribes Maven → 9.0.116
- maven
<dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-tribes</artifactId><version>9.0.116</version></dependency>- gradle
implementation("org.apache.tomcat:tomcat-tribes:9.0.116")
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (vulnerable system)
- High
- Integrity (vulnerable system)
- None
- Availability (vulnerable system)
- None
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Weakness
CWE-209: Generation of Error Message Containing Sensitive Information
The product generates an error message that includes sensitive information about its environment, users, or associated data.
How to prevent it
- Implementation: Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success. If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files. Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
- Implementation: Handle exceptions internally and do not display errors containing potentially sensitive information to a user.
- Implementation: Use naming conventions and strong types to make it easier to spot when sensitive data is being used. When creating structures, objects, or other complex entities, separate the sensitive and non-sensitive data as much as possible.
- Implementation, Build and Compilation: Debugging information should not make its way into a production release.
- Implementation, Build and Compilation: Debugging information should not make its way into a production release.
- System Configuration: Where available, configure the environment to use less verbose error messages. For example, in PHP, disable the display_errors setting during configuration, or at runtime using the error_reporting() function.
- System Configuration: Create default error pages or messages that do not leak any information.
References
Advisories
Packages
Other links
- github.com/apache/tomcat/commit/0112ed22abfccc3d54e44d91eb08804d0886acd1
- github.com/apache/tomcat/commit/607ebc0fa522bd9e8c05517baa2d179bbd1e659c
- github.com/apache/tomcat/commit/6d955cceca841f2eabf2d6c46b59a8c7e1cd6eaa
- lists.apache.org/thread/lzt04z2pb3dc5tk85obn80xygw3z1p0w
- tomcat.apache.org/security-10.html
- tomcat.apache.org/security-11.html
- tomcat.apache.org/security-9.html
- herodevs.com/vulnerability-directory/cve-2026-29146
- openwall.com/lists/oss-security/2026/04/09/24
- access.redhat.com/errata/RHSA-2026:20405
- access.redhat.com/errata/RHSA-2026:20406
- access.redhat.com/errata/RHSA-2026:36787
- access.redhat.com/errata/RHSA-2026:36788
- access.redhat.com/errata/RHSA-2026:36789
- access.redhat.com/errata/RHSA-2026:36790
- access.redhat.com/errata/RHSA-2026:36876
- access.redhat.com/errata/RHSA-2026:36877
- access.redhat.com/errata/RHSA-2026:36878
- access.redhat.com/errata/RHSA-2026:36879
- access.redhat.com/errata/RHSA-2026:37136
- access.redhat.com/errata/RHSA-2026:37137
- access.redhat.com/errata/RHSA-2026:38505
- access.redhat.com/errata/RHSA-2026:39188
- access.redhat.com/errata/RHSA-2026:39189
- access.redhat.com/security/cve/CVE-2026-29146
- bugzilla.redhat.com/show_bug.cgi
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29146.json
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-69r9-qgr7-g2wj Apache Tomcat Missing Encryption of Sensitive Data vulnerability | High Known exploited | Also affects org.apache.tomcat:tomcat |
| GHSA-h3x4-894j-xpx5 Apache Tomcat's FORM authentication process has an Incorrect Authorization vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-9xv2-5v5q-p794 Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-gcx9-497g-6cp6 Apache Tomcat has an Improper Access Control, Incorrect Authorization vulnerability | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-5m62-pw8w-7w9f Apache Tomcat - Security constraints not correctly applied | Critical | Also affects org.apache.tomcat:tomcat |
| GHSA-9m89-8frq-c98c Apache Tomcat - AJP secret compared in non-constant time | Low | Also affects org.apache.tomcat:tomcat |
| GHSA-5mp6-jrq3-r938 Apache Tomcat: LockOutRealm treats user names as case-sensitive | High | Also affects org.apache.tomcat:tomcat |
| GHSA-h6fc-48rj-7qqh Apache Tomcat - Digest authenticator will authenticate any unknown user | Critical | Also affects org.apache.tomcat:tomcat |
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