EUVD-2026-31522
GHSA-2jpj-7p7q-hfqj
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in Microsoft Entra ID enables remote unauthenticated attackers to bypass origin validation and gain elevated privileges across tenant boundaries (scope-changed). The CVSS 10.0 rating reflects maximum impact across confidentiality, integrity, and availability with no authentication or user interaction required, though no public exploit has been identified at time of analysis and EPSS data is not provided.
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RemediationAI
Within 24 hours: Declare SEV-1 incident, notify Entra ID administrators and security team, and assess current multi-tenant federation configuration. Within 7 days: Apply the latest Microsoft Entra ID security patch released for CVE-2026-42901 per Microsoft Security Update Guide to all environments. …
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External POC / Exploit Code
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