CVE-2026-66299
CVE CVE-2026-66299EUVD EUVD-2026-49855Published 2026-07-28T14:29:05.000ZLast changed 2026-07-28T17:40:03.000ZCVSS 7.5
What the advisory describes
Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue. Users are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), 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 11.0.0-M20 ≤11.0.24; 9.0.89 ≤9.0.120; 10.1.24 ≤10.1.57
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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