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CVE-2026-65905 — Vulnerability in...

CRITICAL

Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability

Published August 26, 2026Updated September 11, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published August 26, 2026 (47 days ago).
  • Last revised September 11, 2026 — 16 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.apache.tomcat:tomcat-catalina to 10.1.58 or later
<!-- Update pom.xml dependency version to 10.1.58 for org.apache.tomcat:tomcat-catalina -->
Maven
Update org.apache.tomcat:tomcat to 10.1.58 or later
<!-- Update pom.xml dependency version to 10.1.58 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 9.0.121 or later
<!-- Update pom.xml dependency version to 9.0.121 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat to 11.0.25 or later
<!-- Update pom.xml dependency version to 11.0.25 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat:tomcat-catalina to 9.0.121 or later
<!-- Update pom.xml dependency version to 9.0.121 for org.apache.tomcat:tomcat-catalina -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 11.0.25 or later
<!-- Update pom.xml dependency version to 11.0.25 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat-catalina to 11.0.25 or later
<!-- Update pom.xml dependency version to 11.0.25 for org.apache.tomcat:tomcat-catalina -->
Maven
Update org.apache.tomcat:tomcat to 9.0.121 or later
<!-- Update pom.xml dependency version to 9.0.121 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 10.1.58 or later
<!-- Update pom.xml dependency version to 10.1.58 for org.apache.tomcat.embed:tomcat-embed-core -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (15)

Affects 1 ecosystem: maven (3).

PackageEcosystemAffectedFixed In
org.apache.tomcat.embed:tomcat-embed-core
maven
8.5.0, 8.5.100, 8.5.11, 8.5.12 (+81 more)Range-based data available
org.apache.tomcat:tomcat-catalina
maven
8.5.0, 8.5.100, 8.5.11, 8.5.12 (+81 more)Range-based data available
org.apache.tomcat:tomcat-catalina
maven
10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+60 more)10.1.58
org.apache.tomcat:tomcat
maven
10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+60 more)10.1.58
org.apache.tomcat:tomcat
maven
7.0.100, 7.0.103, 7.0.104, 7.0.105 (+48 more)Range-based data available
org.apache.tomcat.embed:tomcat-embed-core
maven
9.0.0.M1, 9.0.0.M10, 9.0.0.M11, 9.0.0.M13 (+115 more)9.0.121
org.apache.tomcat:tomcat
maven
11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+41 more)11.0.25
org.apache.tomcat.embed:tomcat-embed-core
maven
7.0.100, 7.0.103, 7.0.104, 7.0.105 (+52 more)Range-based data available
org.apache.tomcat:tomcat-catalina
maven
7.0.100, 7.0.103, 7.0.104, 7.0.105 (+52 more)Range-based data available
org.apache.tomcat:tomcat
maven
8.5.0, 8.5.100, 8.5.11, 8.5.12 (+81 more)Range-based data available
org.apache.tomcat:tomcat-catalina
maven
9.0.0.M1, 9.0.0.M10, 9.0.0.M11, 9.0.0.M13 (+115 more)9.0.121
org.apache.tomcat.embed:tomcat-embed-core
maven
11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+41 more)11.0.25
org.apache.tomcat:tomcat-catalina
maven
11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+41 more)11.0.25
org.apache.tomcat:tomcat
maven
9.0.0.M1, 9.0.0.M10, 9.0.0.M11, 9.0.0.M13 (+115 more)9.0.121
org.apache.tomcat.embed:tomcat-embed-core
maven
10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+60 more)10.1.58

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-65905?
Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-65905?
CVE-2026-65905 affects org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat-catalina and org.apache.tomcat:tomcat. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-65905 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-9xv2-5v5q-p794
BIT-tomcat-2026-65905

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