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GHSA-fv25-8xcx-gqjc

Apache Tomcat - WebSocket authentication header exposure

Source: GitHub Advisory Database (reviewed) High CVE-2026-42498

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.tomcat.embed:tomcat-embed-core < 9.0.118 9.0.118
Maven org.apache.tomcat.embed:tomcat-embed-core >= 10.1.0-M1, < 10.1.55 10.1.55
Maven org.apache.tomcat.embed:tomcat-embed-core >= 11.0.0-M1, < 11.0.22 11.0.22
Maven org.apache.tomcat:tomcat < 9.0.118 9.0.118
Maven org.apache.tomcat:tomcat >= 10.1.0-M1, < 10.1.55 10.1.55
Maven org.apache.tomcat:tomcat >= 11.0.0-M1, < 11.0.22 11.0.22
Maven org.apache.tomcat:tomcat-catalina < 9.0.118 9.0.118
Maven org.apache.tomcat:tomcat-catalina >= 10.1.0-M1, < 10.1.55 10.1.55
Maven org.apache.tomcat:tomcat-catalina >= 11.0.0-M1, < 11.0.22 11.0.22

Details

As written in the advisory (Markdown source, shown as plain text).

Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.2 to 9.0.117 Older, unsupported versions may also be affected Description: If a WebSocket request was redirected after authentication, Tomcat's WebSocket client would present the most recent authentication header to the redirect target host. 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 Credit: This issue was identified by lokerxx

References

External links from the advisory. They lead to third-party sites.