CVE-2026-68569: Improper Authentication

August 25, 2026 (updated September 21, 2026)

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.

References

lists.apache.org/thread/8robqo76q0osxgw0b5lcwgz0hcf9h4zc
nvd.nist.gov/vuln/detail/CVE-2026-68569

Code Behaviors & Features

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