Microsoft Security Response CenterCVE-2026-66313

Microsoft Edge (Chromium-based) Tampering Vulnerability

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.

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6.8CVSS out of 10High severity

Scope

What the vendor says is affected

Microsoft Edge (Chromium-based)

Versions the vendor lists as fixed

151.0.4129.59

Next step

What the vendor recommends

Release Notes

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Timeline

When this advisory changed

Jul 31, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 28, 2026 at 11:20 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-66313View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-66313
Last source check: Sep 28, 2026 at 11:20 AM UTC

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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