---
id: CVE-2026-57977
title: Microsoft Edge (Chromium-based) Spoofing Vulnerability
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: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-79
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: '2026-07-06T16:32:26.892713Z'
published: '2026-07-03'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T18:24:54.088Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-57977'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57977'
    label: Microsoft Edge (Chromium-based) Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00577
epssPercentile: 0.45167
ingestedAt: '2026-09-08T17:06:31.902Z'
---

## 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.

## Affected

- `edge_chromium-based >= 1.0.0.0 < 150.0.4078.48`

## Remediation

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