CVE-2026-66314

Medium

Description

Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Microsoft Edge Chromium

PublishedAug 4, 2026

First seenAug 4, 2026

Weakness typeCWE-367CWE-367

How to fix

Update

microsoft edge_chromium151.0.4129.59 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66314

Affected products

Product	Affected versions	Fixed in
microsoft edge_chromium	v < 151.0.4129.59	151.0.4129.59

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