CVE-2026-33843 Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability

Critical 9.1 Published 22 May 2026 Updated 10 Aug 2026

An authentication bypass in Azure AD B2C allows attackers to elevate privileges over the network, requiring immediate patching.

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-2026-33843?

CVE-2026-33843 is a critical authentication bypass vulnerability in Microsoft Entra, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.

Weakness: CWE-288

Which versions are affected by CVE-2026-33843?

It affects 1 product.

Products include Microsoft Entra Id.

How do I fix CVE-2026-33843?

No fix has been published for CVE-2026-33843 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-33843 being exploited?

There is no known exploitation of CVE-2026-33843 in the wild and no public exploit code.

Sources

Also known as GHSA-5gj2-5693-p684.