EUVD-2026-31519
GHSA-5gj2-5693-p684
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
1DescriptionNVD
Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.
AnalysisAI
Authentication bypass in Microsoft Azure Active Directory B2C (now part of Microsoft Entra) allows remote unauthenticated attackers to elevate privileges by reaching protected functionality through an alternate code path. The CVSS 9.1 vector (AV:N/AC:L/PR:N/UI:N) reflects network-reachable exploitation with no privileges and no user interaction, yielding high confidentiality and integrity impact against tenants relying on Azure AD B2C for identity. …
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RemediationAI
24 hours: Identify all Azure AD B2C / Microsoft Entra tenants in production and assess systems dependent on this service for authentication and access control. 7 days: Apply Microsoft's released patch to all affected Azure AD B2C instances, prioritizing tenants handling sensitive or regulated customer data. …
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