Apache Tomcat TOCTOU Race in Unix Domain Socket (v11.0.0-M111.0.24)
CVE-2026-65183 Published on August 25, 2026
Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets
Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat when creating unix domain sockets allows an unauthorised local user to access the unix domain socket.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.42 through 9.0.120.
Users are recommended to upgrade to version 11.0.25, 10.1.58, 9.0.121, which fixes the issue.
Weakness Type
What is a TOCTTOU Vulnerability?
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.
CVE-2026-65183 has been classified to as a TOCTTOU vulnerability or weakness.
Products Associated with CVE-2026-65183
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Affected Versions
Apache Software Foundation Apache Tomcat:- Version 11.0.0-M1, <= 11.0.24 is affected.
- Version 10.1.0-M1, <= 10.1.57 is affected.
- Version 9.0.42, <= 9.0.120 is affected.
- Version 8.5.0, <= 8.5.100 is unaffected.
- Version 7.0.0, <= 7.0.109 is unaffected.