GHSA-7895-gffq-w6jq
Apache Tomcat has a Missing Critical Step in Authentication vulnerability
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without providing the correct password.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.
Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-55957
- https://github.com/apache/tomcat/commit/0cd21c0393b8811af22daddbba7b4e7328e2d79e
- https://github.com/apache/tomcat/commit/c32bbd37ea9ee0aaab848af4ee1c9a76e84240ea
- https://github.com/apache/tomcat/commit/fd96ab415631eea44636c94f911dd38427070ef9
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh
- 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/2026/06/29/26