Type Confusion in Microsoft Edge - CVE-2026-58289
Published: July 17, 2026
Vulnerability identifier: #VU138361
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58289
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 crafted 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 deceptive or invisible form elements and two sequential taps by the user. An exploited vulnerability can affect resources beyond the security scope of the vulnerable component.
Affected software
Microsoft Edge
How to mitigate CVE-2026-58289
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48