Vulnerability in Microsoft Edge (Chromium-Based)

CVE-2026-58616

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.

Vulnerability class: Race Condition

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-58616?
CVE-2026-58616 is a medium-severity vulnerability in Microsoft Edge (Chromium-Based), classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.4/10. Published 2026-08-28.
How severe is CVE-2026-58616?
Medium severity. CVSS v3 base score is 4.4 out of 10.