CVE-2026-34500: CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled in Apache Software Foundation Apache Tomcat
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
AI Analysis
Technical Summary
The CLIENT_CERT authentication mechanism in Apache Tomcat does not correctly fail under some conditions when soft fail is disabled and the FFM (Flexible Feature Manager) is used. This flaw affects multiple versions across the 9.x, 10.x, and 11.x branches of Apache Tomcat. The issue is resolved in the updated versions 11.0.21, 10.1.54, and 9.0.117, which users are advised to upgrade to.
Potential Impact
If exploited, this vulnerability could allow authentication to succeed when it should fail, potentially leading to unauthorized access. However, there are no known exploits in the wild at this time. The impact is limited to scenarios where CLIENT_CERT authentication is used with soft fail disabled and FFM enabled.
Mitigation Recommendations
Users should upgrade Apache Tomcat to versions 11.0.21, 10.1.54, or 9.0.117 as these versions contain the fix for this vulnerability. No other mitigation or temporary workaround is specified. Patch status is confirmed by the vendor advisory recommending these upgrades.
CVE-2026-34500: CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled in Apache Software Foundation Apache Tomcat
Description
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The CLIENT_CERT authentication mechanism in Apache Tomcat does not correctly fail under some conditions when soft fail is disabled and the FFM (Flexible Feature Manager) is used. This flaw affects multiple versions across the 9.x, 10.x, and 11.x branches of Apache Tomcat. The issue is resolved in the updated versions 11.0.21, 10.1.54, and 9.0.117, which users are advised to upgrade to.
Potential Impact
If exploited, this vulnerability could allow authentication to succeed when it should fail, potentially leading to unauthorized access. However, there are no known exploits in the wild at this time. The impact is limited to scenarios where CLIENT_CERT authentication is used with soft fail disabled and FFM enabled.
Mitigation Recommendations
Users should upgrade Apache Tomcat to versions 11.0.21, 10.1.54, or 9.0.117 as these versions contain the fix for this vulnerability. No other mitigation or temporary workaround is specified. Patch status is confirmed by the vendor advisory recommending these upgrades.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-03-30T08:34:56.185Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d806d21cc7ad14da15a565
Added to database: 4/9/2026, 8:06:42 PM
Last enriched: 4/9/2026, 8:21:36 PM
Last updated: 4/10/2026, 8:15:14 AM
Views: 5
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