Apache Tomcat: CLIENT_CERT authentication does not fail as expected
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.tomcat:tomcat-coyote-ffm | >= 9.0.92, < 9.0.117, >= 10.1.22, < 10.1.54, >= 11.0.0-M14, < 11.0.21 | 9.0.117, 10.1.54, 11.0.21 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-34500
- https://github.com/apache/tomcat/commit/29b56a56ce9e7d044b6162a99af0f38529b3a208
- https://github.com/apache/tomcat/commit/c13e60e732ea6d07087293a41ad1866c20848271
- https://github.com/apache/tomcat/commit/ff589ab26e8250a2ca4286d986305318c033ff9f
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2
- https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.54
- https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.21
- https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.117
- http://www.openwall.com/lists/oss-security/2026/04/09/29
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N- Weakness (CWE)
CWE-287- Platform
- Java / Kotlin (Maven)
- Package
org.apache.tomcat:tomcat-coyote-ffm- Disclosed
- 09.04.2026
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-24j9-x2wg-9qv6 - CC BY 4.0
Vulnerability history: org.apache.tomcat:tomcat-coyote-ffm
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 04.2026 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 1
Disclosures per year
- 2026: 2
-
Apache Tomcat: CLIENT_CERT authentication does not fail as expected this entry
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