CVE-2026-80353

Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets - Fix for CVE-2026-65183 did not address APR connector

State: Published
Severity: 8.1 High
Published: Oct 20, 2026
Updated: Oct 29, 2026
Reserved: Aug 26, 2026

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Description

Time-of-check time-of-use (TOCTOU) race condition vulnerability in Apache Tomcat when creating unix domain sockets for the APR/Native connector allows an unauthorised local user to access the unix domain socket. The fix for CVE-2026-65183 only addressed the NIO connector. It did not address the same issue in the APR/Native connector.

This issue affects Apache Tomcat: from 9.0.47 through 9.0.122.

Users are recommended to upgrade to version 9.0.123, which fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-367 Time-of-check time-of-use (TOCTOU) race condition

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	9.0.47 through 9.0.122Affected

References

https://lists.apache.org/thread.html/tr0q87qwvs80p9hc53tkwpzvnx0ywftrvendor-advisory

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