---
id: CVE-2026-50521
title: >-
  Use after free in Microsoft Edge (Chromium-based) allows an authorized
  attacker to execute code over a network.
summary: >-
  Use after free in Microsoft Edge (Chromium-based) allows an authorized
  attacker to execute code over a network.
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-416
vendor: microsoft
product: edge_chromium
affected:
  - edge_chromium < 149.0.4022.67
patched:
  - edge_chromium 149.0.4022.67
published: '2026-07-01'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50521'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50521'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00822
epssPercentile: 0.55498
ingestedAt: '2026-07-03T20:53:53.308Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-02T00:00:00+00:00'
---

## Overview

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

## Affected

- `edge_chromium < 149.0.4022.67`

## Remediation

Upgrade past the affected range:

- `edge_chromium 149.0.4022.67`