Type Confusion in Microsoft Edge - CVE-2026-58290
Published: July 17, 2026
Vulnerability identifier: #VU138362
CSH Severity: Medium
CVSS v4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58290
CWE-ID: CWE-843
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 access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) when rendering attacker-controlled web content or opening a specially crafted file. A remote attacker can convince a user to visit a specially crafted website or open a specially crafted file to execute arbitrary code.
Successful exploitation requires user interaction and depends on crafting deceptive or invisible form elements and having the user perform two sequential taps that activate autofill.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58290
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48