CVE-2026-58616

Medium

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

SeverityMedium

CVSS4.4

Exploit probability—

Product

Microsoft Edge Chromium

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-362Race condition

How to fix

Update

microsoft edge_chromium152.0.4191.53 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58616

Affected products

Product	Affected versions	Fixed in
microsoft edge_chromium	v < 152.0.4191.53	152.0.4191.53

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