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
CVE-2026-34500 is a vulnerability in Apache Tomcat's CLIENT_CERT authentication where authentication does not fail as expected under certain conditions when soft fail is disabled and FFM (Flexible Forwarding Mode) is used. This flaw affects Apache Tomcat versions 11.0.0-M14 through 11.0.20, 10.1.22 through 10.1.53, and 9.0.92 through 9.0.116. The issue is related to improper authentication failure handling (CWE-287). The vendor has addressed the vulnerability in Apache Tomcat versions 11.0.21, 10.1.54, and 9.0.117.
Potential Impact
The vulnerability allows CLIENT_CERT authentication to succeed or not fail as expected in some scenarios, potentially leading to unauthorized access or bypass of intended authentication controls. The CVSS score of 6.5 indicates a medium severity impact with high confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat instances to versions 11.0.21, 10.1.54, or 9.0.117 where the issue is fixed. Patch status is confirmed by the vendor's recommended upgrade versions. No additional mitigation steps are indicated.
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
CVE-2026-34500 is a vulnerability in Apache Tomcat's CLIENT_CERT authentication where authentication does not fail as expected under certain conditions when soft fail is disabled and FFM (Flexible Forwarding Mode) is used. This flaw affects Apache Tomcat versions 11.0.0-M14 through 11.0.20, 10.1.22 through 10.1.53, and 9.0.92 through 9.0.116. The issue is related to improper authentication failure handling (CWE-287). The vendor has addressed the vulnerability in Apache Tomcat versions 11.0.21, 10.1.54, and 9.0.117.
Potential Impact
The vulnerability allows CLIENT_CERT authentication to succeed or not fail as expected in some scenarios, potentially leading to unauthorized access or bypass of intended authentication controls. The CVSS score of 6.5 indicates a medium severity impact with high confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat instances to versions 11.0.21, 10.1.54, or 9.0.117 where the issue is fixed. Patch status is confirmed by the vendor's recommended upgrade versions. No additional mitigation steps are indicated.
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: 4/17/2026, 12:24:40 PM
Last updated: 5/25/2026, 2:19:36 AM
Views: 156
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