---
id: CVE-2026-88078
title: Microsoft Edge (Chromium-based) Spoofing Vulnerability
summary: >-
  Improper verification of cryptographic signature in Microsoft Edge
  (Chromium-based) allows an unauthorized attacker to perform spoofing over a
  network.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-347
vendor: Microsoft
product: Microsoft Edge (Chromium-based)
affected:
  - edge_chromium-based >= 1.0.0.0 < 156.0.4314.42
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-30T13:37:57.479805Z'
published: '2026-10-29'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T18:13:37.641Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-88078'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88078'
    label: Microsoft Edge (Chromium-based) Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00292
epssPercentile: 0.21922
ingestedAt: '2026-11-05T18:28:50.657Z'
---

## Overview

Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `edge_chromium-based >= 1.0.0.0 < 156.0.4314.42`

## Remediation

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