---
id: CVE-2026-55945
title: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in Microsoft Edge (Chromium-based) allows an authorized
  attacker to disclose information locally.
summary: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in Microsoft Edge (Chromium-based) allows an authorized
  attacker to disclose information locally.
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-362
published: '2026-07-03'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55945'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55945'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00193
epssPercentile: 0.09232
ingestedAt: '2026-07-04T16:56:19.081Z'
vendor: Microsoft
product: Microsoft Edge (Chromium-based)
affected:
  - edge_chromium-based >= 1.0.0.0 < 150.0.4078.48
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-06T12:37:16.525115Z'
---

## Overview

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.

## Remediation

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