CVE-2026-58276

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

CVE-2026-58276 is fixed in 4 products on 2 platforms, first by Microsoft Edge 150.0.4078.48, released July 2, 2026. It is not reported as exploited. Patch Radar priority: High.

HighFixed on 2 platforms

CVSS

7.5

Important

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0061

49th percentile

<p>Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Microsoft Edge	150.0.4078.48	Microsoft Edge 150.0.4078.48	Jul 2, 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	150.0.4078.48	Microsoft Edge WebView2 Runtime 150.0.4078.48	Jul 2, 2026
macOS
Microsoft Edge	150.0.4078.50	Microsoft Edge 150.0.4078.50	Jul 2, 2026

Details

Published
July 3, 2026
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58276

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