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Advisory record · GHSA-95jq-rwvf-vjx4

Apache Tomcat: CLIENT_CERT authentication does not fail as expected

CVSS 9.1 CriticalCriticalEPSS 0.0073 · 54th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 9 Apr 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat:tomcat-coyote-ffmMaven>=9.0.83, <9.0.116 || >=10.1.0-M7, <10.1.53 || >=11.0.0-M1, <11.0.209.0.116, 10.1.53, 11.0.20
org.apache.tomcat:tomcatMaven>=9.0.83, <9.0.116 || >=10.1.0-M7, <10.1.53 || >=11.0.0-M1, <11.0.209.0.116, 10.1.53, 11.0.20
Identifiers
GHSA-95jq-rwvf-vjx4 · BIT-tomcat-2026-29145 · CVE-2026-29145
Weakness (CWE)
CWE-287
Tags
Published
9 Apr 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache Tomcat versions 9.0.83 through 9.0.115, 10.1.0-M7 through 10.1.52, and 11.0.0-M1 through 11.0.18, along with the tomcat-coyote-ffm and Apache Tomcat Native libraries, fail to reject client certificate authentication as expected in some scenarios when soft fail is disabled. The source gives few details about the exact conditions or what an attacker can do after bypassing the check. Upgrade Tomcat to 9.0.116, 10.1.53, or 11.0.20, or Tomcat Native to 1.3.7 or 2.0.14.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0073, the 54th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.