Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. (CVE-2026-66299)
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.
Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. (CVE-2026-66299)
Description
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.
CVSS v3.1
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rpf9-hrjr-88fv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-66299"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6941de9c2644c7f86c54d8
Added to database: 07/28/2026, 23:57:18 UTC
Last updated: 07/29/2026, 03:21:57 UTC
Views: 2
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