---
id: CVE-2026-77490
title: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker
  to perform spoofing over a network.
summary: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker
  to perform spoofing over a network.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: Microsoft
product: Microsoft Edge (Chromium-based)
affected:
  - edge_chromium-based >= 1.0.0.0 < 151.0.4129.107
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:30:49.967'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77490'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77490'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00299
epssPercentile: 0.22777
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-11T20:07:41.617502Z'
ingestedAt: '2026-09-14T13:14:45.581Z'
---

## Overview

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

## Remediation

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