# CVE-2026-65905

## Summary

- **CVE ID:** CVE-2026-65905
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-294
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 26, 2026

## Description

Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST 
authenticated request with a nonceCount on the upper boundary of the 
replay window then that request is replayable once only while the 
associated nonceCount remains within the replay window.



 

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.



The following versions were EOL at the time the CVE was created but are 
known to be affected: from 8.5.0 through 8.5.100, from 7.0.30 through 7.0.109. Other unsupported versions may also be affected.



Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

## Affected Products

- Apache Software Foundation — Apache Tomcat (11.0.0-M1)
- Apache Software Foundation — Apache Tomcat (10.1.0-M1)
- Apache Software Foundation — Apache Tomcat (9.0.0.M1)
- Apache Software Foundation — Apache Tomcat (8.5.0)
- Apache Software Foundation — Apache Tomcat (7.0.30)

## References

- [CNA](https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj)
- [CVE](http://www.openwall.com/lists/oss-security/2026/08/26/4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.77%
- **EPSS Percentile:** 53.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._