Bug 2494676 (CVE-2026-55956) - CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
Summary: CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security ...
Keywords:
Status: NEW
Alias: CVE-2026-55956
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: 2498059
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-29 21:02 UTC by OSIDB Bzimport
Modified: 2026-07-14 16:12 UTC (History)
10 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-2026:39188 0 None None None 2026-07-14 16:11:59 UTC
Red Hat Product Errata RHSA-2026:39189 0 None None None 2026-07-14 16:08:58 UTC

Description OSIDB Bzimport 2026-06-29 21:02:39 UTC 
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected.

Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
Comment 3 errata-xmlrpc 2026-07-14 16:08:57 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 7.0.0

Via RHSA-2026:39189 https://access.redhat.com/errata/RHSA-2026:39189
Comment 4 errata-xmlrpc 2026-07-14 16:11:52 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 7.0 on RHEL 10
  Red Hat JBoss Web Server 7.0 on RHEL 8
  Red Hat JBoss Web Server 7.0 on RHEL 9

Via RHSA-2026:39188 https://access.redhat.com/errata/RHSA-2026:39188
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