CVE-2026-29145: 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 vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13. Users are recommended to upgrade to version Tomcat Native 1.3.7 or 2.0.14 and Tomcat 11.0.20, 10.1.53 and 9.0.116, which fix the issue.
AI Analysis
Technical Summary
This vulnerability in Apache Tomcat and Apache Tomcat Native involves the CLIENT_CERT authentication mechanism failing to reject invalid client certificates as expected when the soft fail option is disabled. This improper authentication failure handling can allow unauthorized users to bypass client certificate authentication under certain conditions. The vulnerability affects multiple versions of Apache Tomcat and Tomcat Native, with fixed versions now available. The CVSS 3.1 base score is 9.1, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality and integrity.
Potential Impact
The vulnerability allows an attacker to bypass CLIENT_CERT authentication in affected Apache Tomcat and Tomcat Native versions, potentially gaining unauthorized access to systems relying on client certificate authentication. The impact is high on confidentiality and integrity, as unauthorized users may access sensitive data or perform unauthorized actions. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrading to the fixed versions is recommended: Apache Tomcat 9.0.116, 10.1.53, or 11.0.20 and Apache Tomcat Native 1.3.7 or 2.0.14. These versions address the authentication failure issue. No other mitigation guidance is provided. Patch status is confirmed by the vendor advisory recommending these upgrades.
CVE-2026-29145: 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 vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13. Users are recommended to upgrade to version Tomcat Native 1.3.7 or 2.0.14 and Tomcat 11.0.20, 10.1.53 and 9.0.116, which fix the issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Tomcat and Apache Tomcat Native involves the CLIENT_CERT authentication mechanism failing to reject invalid client certificates as expected when the soft fail option is disabled. This improper authentication failure handling can allow unauthorized users to bypass client certificate authentication under certain conditions. The vulnerability affects multiple versions of Apache Tomcat and Tomcat Native, with fixed versions now available. The CVSS 3.1 base score is 9.1, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality and integrity.
Potential Impact
The vulnerability allows an attacker to bypass CLIENT_CERT authentication in affected Apache Tomcat and Tomcat Native versions, potentially gaining unauthorized access to systems relying on client certificate authentication. The impact is high on confidentiality and integrity, as unauthorized users may access sensitive data or perform unauthorized actions. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrading to the fixed versions is recommended: Apache Tomcat 9.0.116, 10.1.53, or 11.0.20 and Apache Tomcat Native 1.3.7 or 2.0.14. These versions address the authentication failure issue. No other mitigation guidance is provided. Patch status is confirmed by the vendor advisory recommending these upgrades.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-03-04T09:52:45.179Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d7ff941cc7ad14da10e9cb
Added to database: 4/9/2026, 7:35:48 PM
Last enriched: 4/17/2026, 12:18:29 PM
Last updated: 5/25/2026, 12:17:58 PM
Views: 192
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