CVE-2026-58616: Microsoft Edge Chromium

Low severity, CVSS 3.0. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Microsoft Edge Chromium: before 152.0.4191.53 (fixed in 152.0.4191.53)

Published 2026-08-28. Last modified 2026-09-11.