Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
Maven

CVE-2026-29146

HIGH

CVE-2026-29146 is a high-severity (CVSS 7.5) CWE-209 vulnerability in org.apache.tomcat:tomcat-tribes. O3 Security confirms whether CVE-2026-29146 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default

Also known asBIT-tomcat-2026-29146GHSA-h468-7pvh-8vr8
Published
Apr 9, 2026
Updated
Aug 6, 2026
Affected
10 pkgs
Patched
6 / 10
Exploits
None indexed

Blast Radius

10 pkgs affected
org.apache.tomcat:tomcat-tribesorg.apache.tomcat:tomcat-tribesorg.apache.tomcat:tomcat-tribesorg.apache.tomcat:tomcatorg.apache.tomcat:tomcatorg.apache.tomcat:tomcatorg.apache.tomcat:tomcat-tribesorg.apache.tomcat:tomcat+2 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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 Packages

10 total 6 fixed
EcosystemPackageVulnerable rangeFix
Mavenorg.apache.tomcat:tomcat-tribes9.0.13&&< 9.0.1169.0.116
Mavenorg.apache.tomcat:tomcat-tribes10.1.50&&< 10.1.5310.1.53
Mavenorg.apache.tomcat:tomcat-tribes11.0.0-M1&&< 11.0.2011.0.20
Mavenorg.apache.tomcat:tomcat9.0.13&&< 9.0.1169.0.116
Mavenorg.apache.tomcat:tomcat10.1.50&&< 10.1.5310.1.53
Mavenorg.apache.tomcat:tomcat11.0.0-M1&&< 11.0.2011.0.20

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.tomcat:tomcat-tribes. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update org.apache.tomcat:tomcat-tribes to 9.0.116 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-29146 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2026-29146 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2026-29146. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

Is CVE-2026-29146 in your dependencies?

O3 detects CVE-2026-29146 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.