AIKIDO-2026-262210
tomcat-embed-core is vulnerable to Race Condition (TOCTOU)
53
Medium Risk
This Affects:
tomcat-embed-coreTL;DR
tomcat-embed-core has a time-of-check time-of-use race when creating a Unix domain socket. An unauthorized local user can open the socket during the window between permission setup and use. That exposes the Tomcat connector to a local process that should not have it. The fix creates the socket so another local user cannot open it.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and Tomcat creates a Unix domain socket.
Background info
tomcat-embed-core is vulnerable to Race Condition (TOCTOU) in versions 9.0.42 - 9.0.120, 10.1.0 - 10.1.57 and 11.0.0 - 11.0.24.
How to fix this
Upgrade the org.apache.tomcat.embed:tomcat-embed-core library to the patch version.
Links
tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.25lists.apache.org/thread/748o4st6d5dk6n3l7tgzo5yl68gg05c0openwall.com/lists/oss-security/2026/08/26/2
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