Origin validation error in Microsoft Edge - CVE-2026-57989
Published: July 24, 2026 / Updated: July 25, 2026
Vulnerability identifier: #VU139360
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-57989
CWE-ID: CWE-346
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Edge
Microsoft Edge
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to origin validation error 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.
How to mitigate CVE-2026-57989
Install security update from vendor's website.