Description
Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.







The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.







Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Published: 2026-08-25
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 26 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
References

Wed, 26 Aug 2026 02:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache tomcat
Vendors & Products Apache
Apache tomcat

Tue, 25 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
Description Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Title Apache Tomcat: Principal lookup can fail open in some cases
Weaknesses CWE-287
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-08-26T18:38:54.931Z

Reserved: 2026-07-31T07:51:47.785Z

Link: CVE-2026-68569

cve-icon Vulnrichment

Updated: 2026-08-26T02:30:40.822Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-08-25T22:17:05.837

Modified: 2026-08-26T19:16:54.333

Link: CVE-2026-68569

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T01:45:03Z

Weaknesses