CVE-2026-34500

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.

Affected packages (5)

• Bitnami/tomcat>= 9.0.92, < 9.0.117, >= 10.1.22, < 10.1.54, >= 11.0.0, < 11.0.21
• Debian/tomcat10from 0
• Debian/tomcat11from 0
• Debian/tomcat9from 0, < 9.0.70-2
• Maven/org.apache.tomcat:tomcat-coyote-ffm>= 9.0.92, < 9.0.117

CVSS scores

References (11)

• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-34500
• ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-34500
• PATCHhttps://github.com/apache/tomcat
• WEBhttps://github.com/apache/tomcat/commit/29b56a56ce9e7d044b6162a99af0f38529b3a208
• WEBhttps://github.com/apache/tomcat/commit/c13e60e732ea6d07087293a41ad1866c20848271
• WEBhttps://github.com/apache/tomcat/commit/ff589ab26e8250a2ca4286d986305318c033ff9f
• WEBhttps://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2
• WEBhttps://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.54
• WEBhttps://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.21
• WEBhttps://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.117
• WEBhttp://www.openwall.com/lists/oss-security/2026/04/09/29