apache/tomcat · Security
Apache Tomcat Coyote vulnerable to Denial of Service via excessive HTTP/2 streams
- GHSA ID
- GHSA-25xr-qj8w-c4vf
- CVE ID
- CVE-2025-53506
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-53506 ↗
- https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 ↗
- https://github.com/apache/tomcat/commit/2aa6261276ebe50b99276953591e3a2be7898bdb ↗
- https://github.com/apache/tomcat/commit/434772930f362145516dd60681134e7f0cf8115b ↗
- https://github.com/apache/tomcat/commit/be8f330f83ceddaf3baeed57522e571572b6b99b ↗
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html ↗
- http://www.openwall.com/lists/oss-security/2025/07/10/13 ↗
- https://github.com/advisories/GHSA-25xr-qj8w-c4vf ↗