CVE-2026-77490

Microsoft Edge (Chromium-based) Spoofing Vulnerability

CVE-2026-77490 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

6.1

Moderate

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0041

35th percentile

<p>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.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Microsoft Edge	151.0.4129.107	Microsoft Edge 151.0.4129.107	Aug 23, 2026
Microsoft Edge Beta	152.0.4191.51	Microsoft Edge Beta 152.0.4191.51	Aug 26, 2026
Microsoft Edge Dev	152.0.4167.0	Microsoft Edge Dev 152.0.4167.0	Jul 20, 2026
Microsoft Edge WebView2 Runtime	151.0.4129.107	Microsoft Edge WebView2 Runtime 151.0.4129.107	Aug 24, 2026
macOS
Microsoft Edge	151.0.4129.107	Microsoft Edge 151.0.4129.107	Aug 22, 2026

Details

Published
September 11, 2026
Weakness
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77490

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