[SECURITY] CVE-2026-55957 Apache Tomcat - Authentication bypass with JNDIRealm and GSSAPI authenticated bind
Mark Thomas <[email protected]> Mon, 29 Jun 2026 21:27:39 +0100
| Newsgroups | gmane.comp.apache.maven.announce,gmane.comp.apache.tiles.devel,gmane.comp.jakarta.tomcat.user |
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CVE-2026-55957 Apache Tomcat - Authentication bypass with JNDIRealm and GSSAPI authenticated bind Severity: Important Vendor: The Apache Software Foundation Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.4 Apache Tomcat 10.1.0-M1 to 10.1.36 Apache Tomcat 9.0.0.M1 to 9.0.100 Older, unsupported versions may also be affected Description: If security constraints were specified for the default servlet, any method or method omission configured as part of the constraint was ignored. Mitigation: Users of the affected versions should apply one of the following mitigations: - Upgrade to Apache Tomcat 11.0.5 or later - Upgrade to Apache Tomcat 10.1.37 or later - Upgrade to Apache Tomcat 9.0.101 or later Credit: This issue was identified by: - Ilan Toyter History: 2026-06-29 Original advisory References: [1] https://tomcat.apache.org/security-11.html [2] https://tomcat.apache.org/security-10.html [3] https://tomcat.apache.org/security-9.html