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.
- Affected products
- Apache Tomcat
- Apache Tomcat
- < 9.0.121, 10.1.58, 11.0.25, 11.0.0
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.5% (37th percentile)
- Weakness
- CWE-400
- NVD status
- Analyzed
- Published
- 2026-07-28
CVE-2026-66299 at NVD
No indexed exploits for CVE-2026-66299 yet
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No exploit for CVE-2026-66299 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.