Use-after-free in Microsoft Edge - CVE-2026-58294
Published: July 17, 2026
Vulnerability identifier: #VU138365
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-2026-58294
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 or provide a crafted file to trigger the issue and execute arbitrary code.
User interaction is required, and successful exploitation requires the user to visit attacker-controlled content and perform two sequential tap gestures that activate autofill.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58294
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48