CVE-2026-34500

Name: CVE-2026-34500
Creator: NVD / NIST
Published: 2026-04-09T20:16:25.33+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2026-34500 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS Probability

0.47%

37.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions	Update
Apache	Tomcat	>= 9.0.92, < 9.0.117	—
Apache	Tomcat	>= 10.1.22, < 10.1.54	—
Apache	Tomcat	>= 11.0.1, < 11.0.21	—
Apache	Tomcat	11.0.0	Milestone14

References

https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/29Mailing List, Third Party Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34500?

How severe is CVE-2026-34500?

CVE-2026-34500 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34500?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34500?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST