Race condition in Microsoft Edge - CVE-2026-58616
Published: August 31, 2026
Vulnerability identifier: #VU146306
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58616
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) when handling attacker-controlled web content and autofill activation. A remote user can craft deceptive or invisible form elements and convince the victim to visit a specially crafted webpage to disclose sensitive information.
User interaction is required: the victim must visit an attacker-controlled webpage and perform two sequential taps that cause autofill to activate.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58616
Install security update from vendor's website.
Microsoft Edge - update to 152.0.4191.53