Use-after-free in Microsoft Edge - CVE-2026-58287
Published: July 17, 2026
Vulnerability identifier: #VU138345
CSH Severity: High
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58287
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in Microsoft Edge (Chromium-based) when rendering attacker-controlled web content. A remote attacker can host a specially crafted website and convince a user to view it to execute arbitrary code.
Successful exploitation requires user interaction and high attack complexity, including deceptive or invisible form elements and two sequential taps that activate autofill.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58287
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48