CVE-2026-57978

Microsoft Edge (Chromium-based) Spoofing Vulnerability

CVE-2026-57978 is fixed in 4 products on 2 platforms, first by Microsoft Edge Dev 152.0.4167.0, released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

RoutineFixed on 2 platforms

CVSS

5.4

Important

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0021

11th percentile

<p>Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Microsoft Edge	150.0.4078.99	Microsoft Edge 150.0.4078.99	Jul 24, 2026
Microsoft Edge Beta	151.0.4129.59	Microsoft Edge Beta 151.0.4129.59	Jul 31, 2026
Microsoft Edge Dev	152.0.4167.0	Microsoft Edge Dev 152.0.4167.0	Jul 20, 2026
Microsoft Edge WebView2 Runtime	150.0.4078.99	Microsoft Edge WebView2 Runtime 150.0.4078.99	Jul 24, 2026
macOS
Microsoft Edge	150.0.4078.99	Microsoft Edge 150.0.4078.99	Jul 24, 2026

Details

Published
July 24, 2026
Weakness
Origin Validation Error
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57978

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-57978">CVE-2026-57978 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.