CVE-2026-76183
CVE CVE-2026-76183EUVD EUVD-2026-85225Published 2026-09-23T11:16:09.000ZLast changed 2026-09-30T14:54:21.000ZCVSS 9.8
What the advisory describes
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Apache Software Foundation — Apache Tomcat 10.1.0-M1 ≤10.1.59; 11.0.0-M1 ≤11.0.25; 8.5.0 ≤8.5.100; 7.0.43 ≤7.0.109; 9.0.0.M1 ≤9.0.121
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Apache — Tomcat
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