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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.70-2 |
| sid | Fixed | 10.1.54-1 |
| forky | Fixed | 10.1.54-1 |
| bullseye | Fixed | 9.0.70-2 |
| bookworm | Fixed | 9.0.70-2 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-coyote-ffm | >=9.0.92,<9.0.117 | 9.0.117 |
| Maven | org.apache.tomcat:tomcat-coyote-ffm | >=10.1.22,<10.1.54 | 10.1.54 |
| Maven | org.apache.tomcat:tomcat-coyote-ffm | >=11.0.0-M14,<11.0.21 | 11.0.21 |
| MAVEN | org.apache.tomcat:tomcat-coyote-ffm | >= 11.0.0-M14, < 11.0.21 | 11.0.21 |
| MAVEN | org.apache.tomcat:tomcat-coyote-ffm | >= 10.1.22, < 10.1.54 | 10.1.54 |
| MAVEN | org.apache.tomcat:tomcat-coyote-ffm | >= 9.0.92, < 9.0.117 | 9.0.117 |
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
- https://www.suse.com/security/cve/CVE-2026-34500.html
- https://security-tracker.debian.org/tracker/CVE-2026-34500
- https://github.com/advisories/GHSA-24j9-x2wg-9qv6
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.