# CVE-2025-31650

## Summary

- **CVE ID:** CVE-2025-31650
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-459
- **Published:** Apr 28, 2025
- **Last Modified:** Sep 17, 2026

## Description

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 Products

- Apache Software Foundation — Apache Tomcat (9.0.76)
- Apache Software Foundation — Apache Tomcat (10.1.10)
- Apache Software Foundation — Apache Tomcat (11.0.0-M2)
- Apache Software Foundation — Apache Tomcat (8.5.90)

## References

- [CNA](https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826)
- [CVE](http://www.openwall.com/lists/oss-security/2025/04/28/2)
- [CVE](https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 59.92%
- **EPSS Percentile:** 99.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._