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CVE-2026-68569 is an improper-authentication vulnerability in Apache Tomcat DataSourceRealm. Under certain authentication configurations, including CLIENT-CERT and SPNEGO, Tomcat can fail open when looking up the authenticated principal in the configured DataSourceRealm and authenticate the user even though no corresponding realm user exists. Affected versions are Tomcat 11.0.0-M1 through 11.0.24, 10.1.0-M1 through 10.1.57, and 9.0.0.M1 through 9.0.120. End-of-life Tomcat 8.5.0 through 8.5.100 and 7.0.0 through 7.0.109 are also known to be affected.
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An important fail-open authentication vulnerability in Apache Tomcat's DataSourceRealm handling for CLIENT-CERT and SPNEGO authentication.
An Apache Tomcat authentication-bypass flaw affecting CLIENT-CERT and SPNEGO authentication with DataSourceRealm, where a failed principal lookup can fail open.
An improper-authentication vulnerability in Apache Tomcat's DataSourceRealm authentication handling. Under circumstances such as CLIENT-CERT or SPNEGO authentication, Tomcat could authenticate a user even when that user does not exist in the configured DataSourceRealm.
A network-accessible vulnerability requiring low privileges, with high confidentiality and integrity impact and no availability impact according to the supplied CVSS v3 vector. The content associates it with Debian Linux releases and Debian Tomcat 10/11 packages.
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Cross-references every affected SKU, including bundled OEM variants.
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