CVE-2026-66326 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
An unauthorized attacker can execute code over a network due to missing authorization in Microsoft Edge.
- 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-2026-66326?
CVE-2026-66326 is a medium-severity missing authorization vulnerability in Microsoft Edge Chromium, published on 3 Aug 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
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Weakness: CWE-862
Which versions are affected by CVE-2026-66326?
It affects 1 product.
Products include Microsoft Edge Chromium.
How do I fix CVE-2026-66326?
No fix has been published for CVE-2026-66326 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-66326 being exploited?
There is no known exploitation of CVE-2026-66326 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Edge Chromium
- CVE-2024-21326 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2023-35618 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2023-36735 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2022-33649 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
- CVE-2026-58289 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Sources
Also known as GHSA-jh28-p6w6-8gf8.