Vulnerability record · CVE-2026-34500 · published 9 April 2026

CVE-2026-34500: Apache tomcat improper authentication vulnerability

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.

6.5 CVSS 3.1 Medium EPSS 0.45% · top 62.8% CWE-287 · Improper authentication

6.5CVSS 3.1 base score

0.45%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Tomcat Apache

References

Link	Tags
https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2	Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/29	Mailing ListThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34500), CISA KEV, FIRST EPSS (scores of 2026-10-09). This page is refreshed as NVD updates the record.