Bug 2457043 (CVE-2026-34500) - CVE-2026-34500 Apache Tomcat: Apache Tomcat: Authentication bypass via client certificate misconfiguration
Summary: CVE-2026-34500 Apache Tomcat: Apache Tomcat: Authentication bypass via client...
Keywords:
Status: NEW
Alias: CVE-2026-34500
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2457234
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-09 20:02 UTC by OSIDB Bzimport
Modified: 2026-05-26 12:56 UTC (History)
9 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:20405 0 None None None 2026-05-26 12:56:42 UTC
Red Hat Product Errata RHSA-2026:20406 0 None None None 2026-05-26 12:55:54 UTC

Description OSIDB Bzimport 2026-04-09 20:02:46 UTC 
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.
Comment 3 errata-xmlrpc 2026-05-26 12:55:53 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 6.2.3

Via RHSA-2026:20406 https://access.redhat.com/errata/RHSA-2026:20406
Comment 4 errata-xmlrpc 2026-05-26 12:56:41 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 6.2 on RHEL 10
  Red Hat JBoss Web Server 6.2 on RHEL 8
  Red Hat JBoss Web Server 6.2 on RHEL 9

Via RHSA-2026:20405 https://access.redhat.com/errata/RHSA-2026:20405
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