CVE-2025-31650
Apache Tomcat Denial of Service via invalid HTTP priority header
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- Apache Tomcat 10.1.39 - Denial of Service (DoS)2025-06-05 · remote · multiple
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.apache.tomcat:tomcat-coyote | >= 9.0.76, <= 9.0.102 | 9.0.104 |
| maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.76, <= 9.0.102 | 9.0.104 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Tomcat | from 9.0.76 before 9.0.104 from 10.1.10 before 10.1.40 from 11.0.1 before 11.0.6 Version 11.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826
- http://www.openwall.com/lists/oss-security/2025/04/28/2
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
- https://github.com/advisories/GHSA-3p2h-wqq4-wf4h
- https://nvd.nist.gov/vuln/detail/CVE-2025-31650
- https://github.com/apache/tomcat/commit/1eef1dc459c45f1e421d8bd25ef340fc1cc34edc
- https://github.com/apache/tomcat/commit/40ae788c2e64d018b4e58cd4210bb96434d0100d
- https://github.com/apache/tomcat/commit/75554da2fc5574862510ae6f0d7b3d78937f1d40
- https://github.com/apache/tomcat/commit/8cc3b8fb3f2d8d4d6a757e014f19d1fafa948a60
- https://github.com/apache/tomcat/commit/b7674782679e1514a0d154166b1d04d38aaac4a9
- https://github.com/apache/tomcat/commit/b98e74f517b36929f4208506e5adad22cb767baa
- https://github.com/apache/tomcat/commit/cba1a0fe1289ee7f5dd46c61c38d1e1ac5437bff
- https://github.com/apache/tomcat/commit/ded0285b96b4d3f5560dfc8856ad5ec4a9b50ba9
- https://github.com/apache/tomcat/commit/f619e6a05029538886d5a9d987925d573b5bb8c2
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html