Bug 2524161 (CVE-2026-65905) - CVE-2026-65905 tomcat: Apache Tomcat: Authentication bypass via limited replay attack in DIGEST authenticator
Summary: CVE-2026-65905 tomcat: Apache Tomcat: Authentication bypass via limited repla...
Keywords:
Status: NEW
Alias: CVE-2026-65905
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-25 22:02 UTC by OSIDB Bzimport
Modified: 2026-08-31 17:57 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-25 22:02:25 UTC 
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.
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