Use-after-free in Microsoft Edge - CVE-2026-58276
Published: July 17, 2026
Vulnerability identifier: #VU138355
CSH Severity: Medium
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-2026-58276
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 visit it to execute arbitrary code.
User interaction is required, and successful exploitation requires the user to perform two sequential tap gestures that activate autofill.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58276
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48