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: 2026-09-17 15:03 UTC (History)
10 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:67163 0 None None None 2026-09-14 13:35:24 UTC
Red Hat Product Errata RHSA-2026:67164 0 None None None 2026-09-14 13:35:08 UTC
Red Hat Product Errata RHSA-2026:68659 0 None None None 2026-09-17 14:21:26 UTC
Red Hat Product Errata RHSA-2026:68677 0 None None None 2026-09-17 15:03:15 UTC
Red Hat Product Errata RHSA-2026:68678 0 None None None 2026-09-17 14:33:07 UTC
Red Hat Product Errata RHSA-2026:68679 0 None None None 2026-09-17 14:36:24 UTC
Red Hat Product Errata RHSA-2026:68680 0 None None None 2026-09-17 14:39:13 UTC

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.
Comment 3 Jon Orris 2026-09-14 13:35:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:67164 https://access.redhat.com/errata/RHSA-2026:67164
Comment 4 Jon Orris 2026-09-14 13:35:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:67163 https://access.redhat.com/errata/RHSA-2026:67163
Comment 5 Jon Orris 2026-09-17 14:21:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:68659 https://access.redhat.com/errata/RHSA-2026:68659
Comment 6 Jon Orris 2026-09-17 14:33:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:68678 https://access.redhat.com/errata/RHSA-2026:68678
Comment 7 Jon Orris 2026-09-17 14:36:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:68679 https://access.redhat.com/errata/RHSA-2026:68679
Comment 8 Jon Orris 2026-09-17 14:39:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:68680 https://access.redhat.com/errata/RHSA-2026:68680
Comment 9 Jon Orris 2026-09-17 15:03:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:68677 https://access.redhat.com/errata/RHSA-2026:68677
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