[SECURITY] CVE-2026-43512 Apache Tomcat - Digest authenticator will authenticate any unknown user
Mark Thomas <[email protected]> Tue, 12 May 2026 16:06:42 +0100
| Newsgroups | gmane.comp.jakarta.tomcat.user,gmane.comp.apache.maven.announce,gmane.comp.apache.maven.announce,gmane.comp.clustering.spark.livy.devel |
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| Message-ID | <[email protected]> |
CVE-2026-43512 Apache Tomcat - Digest authenticator will authenticate any unknown user Severity: Moderate Vendor: The Apache Software Foundation Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.0.M1 to 9.0.117 Older, unsupported versions may also be affected Description: When DIGEST authentication was configured, any user not known to the configured Realm would be authenticated if they presented the password "null". Mitigation: Users of the affected versions should apply one of the following mitigations: - Upgrade to Apache Tomcat 11.0.22 or later - Upgrade to Apache Tomcat 10.1.55 or later - Upgrade to Apache Tomcat 9.0.118 or later History: 2026-05-12 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