Link following in Microsoft Edge - CVE-2026-57991
Published: July 17, 2026
Vulnerability identifier: #VU138354
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57991
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper link resolution before file access ('link following') in Microsoft Edge (Chromium-based) when rendering an attacker-controlled webpage. A remote attacker can host a specially crafted website and convince a user to visit it to disclose sensitive information.
User interaction is required, and the user must visit the attacker-controlled webpage and perform two tap gestures that cause autofill to activate.
Affected software
Microsoft Edge
How to mitigate CVE-2026-57991
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48