GHSA-5v3h-fjv2-54fg
Apache Tomcat has an Improper Authorization vulnerability
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected.
Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-55956
- https://github.com/apache/tomcat/commit/3f6bd2ba5e53d1f340bbe5ad2d42a28b29440b7a
- https://github.com/apache/tomcat/commit/9c3b1efb74fd04f77639720af1d48a8f664ad9bb
- https://github.com/apache/tomcat/commit/a0374c450970760efafbd8806a1db278830ba7bd
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfp
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- http://www.openwall.com/lists/oss-security/2026/06/29/25