CVE-2026-45488 Microsoft Edge (Chromium-based) Spoofing Vulnerability

Medium 5.4 Published 3 Jul 2026 Updated 28 Oct 2026

An attacker can spoof critical UI information in Microsoft Edge to mislead users, requiring a browser patch to mitigate.

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-2026-45488?

CVE-2026-45488 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

User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Weakness: CWE-451

Which versions are affected by CVE-2026-45488?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-45488?

No fix has been published for CVE-2026-45488 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-45488 being exploited?

There is no known exploitation of CVE-2026-45488 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-3xgf-55j3-v68w.