---
id: CVE-2026-80353
title: >-
  Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain
  Sockets - Fix for CVE-2026-65183 did not address APR connector
summary: "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-2026-6518…"
severity: none
cwe:
  - CWE-367
vendor: Apache Software Foundation
product: Apache Tomcat
affected:
  - apache_tomcat >= 9.0.47 <= 9.0.122
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T13:42:05.844Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80353'
references:
  - url: 'https://lists.apache.org/thread.html/tr0q87qwvs80p9hc53tkwpzvnx0ywftr'
tags:
  - cve.org
ingestedAt: '2026-10-20T14:08:00.572Z'
---

## Overview

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.

## Affected

- `apache_tomcat >= 9.0.47 <= 9.0.122`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.