Bug 2494669 (CVE-2026-55957) - CVE-2026-55957 tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration
Summary: CVE-2026-55957 tomcat: Apache Tomcat: Authentication bypass via missing criti...
Keywords:
Status: NEW
Alias: CVE-2026-55957
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-29 21:02 UTC by OSIDB Bzimport
Modified: 2026-08-12 15:38 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-06-29 21:02:30 UTC 
Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.
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