---
id: CVE-2026-80353
title: >-
  tomcat: tomcat: Unauthorized socket access via TOCTOU race condition
  (CVE-2026-80353)
summary: >-
  A flaw was found in Apache Tomcat. A local attacker can gain unauthorized
  access to Unix domain communication sockets due to a time-of-check to
  time-of-use (TOCTOU) race condition in the APR/Native connector. When the
  connector initializes…
severity: low
cvss: 3.6
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'
cvssSource: vendor
cwe: CWE-367
vendor: Red Hat
product: Red Hat Hardened Images
affected:
  - hardened_images
patched:
  - hardened_images
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T23:32:57+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80353.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80353.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80353'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2556183'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80353'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80353'
  - url: 'https://lists.apache.org/thread.html/tr0q87qwvs80p9hc53tkwpzvnx0ywftr'
  - url: 'https://access.redhat.com/errata/RHSA-2026:85926'
  - url: 'https://access.redhat.com/errata/RHSA-2026:81365'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
ingestedAt: '2026-10-20T14:08:00.572Z'
epss: 0.00155
epssPercentile: 0.04578
---

## Overview

A flaw was found in Apache Tomcat. A local attacker can gain unauthorized access to Unix domain communication sockets due to a time-of-check to time-of-use (TOCTOU) race condition in the APR/Native connector. When the connector initializes a socket, a brief timing window exists before restrictive permissions are applied, allowing an unauthorized local user to connect to the socket and potentially intercept or manipulate local service communications.

## Vendor advisories

- **RHSA-2026:85926** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85926)
- **RHSA-2026:81365** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:81365)

**tomcat: tomcat: Unauthorized socket access via TOCTOU race condition** — rated Low by Red Hat. Released 2026-10-20.

Fixed:

- Red Hat Hardened Images

## Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:85926
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:81365