CVE-2026-58289 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Critical 9.0 Published 3 Jul 2026 Updated 28 Oct 2026

An attacker can execute arbitrary code remotely via a type confusion vulnerability in Microsoft Edge.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-58289?

CVE-2026-58289 is a critical memory corruption vulnerability in Microsoft Edge Chromium, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Weakness: CWE-843

Which versions are affected by CVE-2026-58289?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-58289?

No fix has been published for CVE-2026-58289 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-58289 being exploited?

There is no known exploitation of CVE-2026-58289 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-39f3-ggrp-rph3.