Fixed in Apache Tomcat 11.0.12

Low: Delayed cleaning of multipart upload temporary files may lead to DoS CVE-2025-61795 If an error occurred including exceeding limits during the processing of a multipart upload, temporary copies of the uploaded parts written to local storage were not cleaned up immediately but left for the...

Fixed in Apache Tomcat 9.0.110

Low: Delayed cleaning of multipart upload temporary files may lead to DoS CVE-2025-61795 If an error occurred including exceeding limits during the processing of a multipart upload, temporary copies of the uploaded parts written to local storage were not cleaned up immediately but left for the...

Fixed in Apache Tomcat 11.0.5

Important: Authentication bypass with JNDIRealm and GSSAPI authenticated bind CVE-2026-55957 When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker was able authenticate without providing the correct password. This was fixed with commits fd96ab41. This issue was reporte...

Fixed in Apache Tomcat 9.0.122

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 959a52a2. This issue was reported to the Tomcat security team on 7 September 2026. The iss...

Fixed in Apache Tomcat Native Connector 2.0.16 / 1.3.9

Important: Client certificate requirements can be down-graded CVE-2026-86247 A race condition allowed client certificate verification requirements to be down-graded for some configurations. This was fixed with commit fb688de4 2.0.x and 3dc73c11 1.3.x. This issue was reported to the Tomcat securit...

Fixed in Apache Tomcat 10.1.60

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 567a8551. This issue was reported to the Tomcat security team on 7 September 2026. The iss...