CVEvulnerability
CVE-2026-66299
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-28
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400
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.
Affected configurations
• apache tomcat (>= 9.0.89 < 9.0.121)
• apache tomcat (>= 10.1.24 < 10.1.58)
• apache tomcat (>= 11.0.1 < 11.0.25)
• apache tomcat 11.0.0
Related
Weakness · CWE (1)
- CWE-400 Uncontrolled Resource Consumption weakness
References
- https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/28/25 Mailing List, Third Party Advisory