CVE-2026-42901 Microsoft Entra ID Elevation of Privilege Vulnerability
An origin validation error in Microsoft Entra ID 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-2026-42901?
CVE-2026-42901 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
Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
Weakness: CWE-346
Which versions are affected by CVE-2026-42901?
It affects 1 product.
Products include Microsoft Entra Id.
How do I fix CVE-2026-42901?
No fix has been published for CVE-2026-42901 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-2026-42901 being exploited?
There is no known exploitation of CVE-2026-42901 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Entra
- CVE-2026-69836 Microsoft Entra ID Remote Code Execution Vulnerability
- CVE-2026-35431 Microsoft Entra ID Entitlement Management Spoofing Vulnerability
- CVE-2025-55241 Azure Entra ID Elevation of Privilege Vulnerability
- CVE-2026-83941 Entra ID Elevation of Privilege Vulnerability
- CVE-2026-69851 Microsoft Entra ID Elevation of Privilege Vulnerability
Sources
Also known as GHSA-2jpj-7p7q-hfqj.