CVE-2025-31650: Apache Tomcat Denial of Service via invalid HTTP priority header
(updated )
Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service.
This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.90 though 8.5.100.
Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.
References
- github.com/advisories/GHSA-3p2h-wqq4-wf4h
- github.com/apache/tomcat
- github.com/apache/tomcat/commit/1eef1dc459c45f1e421d8bd25ef340fc1cc34edc
- github.com/apache/tomcat/commit/40ae788c2e64d018b4e58cd4210bb96434d0100d
- github.com/apache/tomcat/commit/75554da2fc5574862510ae6f0d7b3d78937f1d40
- github.com/apache/tomcat/commit/8cc3b8fb3f2d8d4d6a757e014f19d1fafa948a60
- github.com/apache/tomcat/commit/b7674782679e1514a0d154166b1d04d38aaac4a9
- github.com/apache/tomcat/commit/b98e74f517b36929f4208506e5adad22cb767baa
- github.com/apache/tomcat/commit/cba1a0fe1289ee7f5dd46c61c38d1e1ac5437bff
- github.com/apache/tomcat/commit/ded0285b96b4d3f5560dfc8856ad5ec4a9b50ba9
- github.com/apache/tomcat/commit/f619e6a05029538886d5a9d987925d573b5bb8c2
- lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826
- lists.debian.org/debian-lts-announce/2025/07/msg00009.html
- nvd.nist.gov/vuln/detail/CVE-2025-31650
- tomcat.apache.org/security-10.html
- tomcat.apache.org/security-11.html
- tomcat.apache.org/security-9.html
Code Behaviors & Features
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