CVE-2026-56646 Microsoft Edge (Chromium-based) Spoofing Vulnerability

Medium 6.5 Published 3 Jul 2026 Updated 28 Oct 2026

An attacker can exploit a spoofing vulnerability in Microsoft Edge to expose sensitive information to unauthorized actors over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-56646?

CVE-2026-56646 is a medium-severity vulnerability in Microsoft Edge Chromium, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Exposure of sensitive information to an unauthorized actor in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Weakness: CWE-200

Which versions are affected by CVE-2026-56646?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-56646?

No fix has been published for CVE-2026-56646 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-56646 being exploited?

There is no known exploitation of CVE-2026-56646 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-vgq6-3mhg-7562.