← CVE Intelligence

CVE-2026-31957

Himmelblau unset domain configuration can allow any-tenant authentication at first login for remote deployments PUBLISHED

Description (CNA)

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From 3.0.0 to before 3.1.0, if Himmelblau is deployed without a configured tenant domain in himmelblau.conf, authentication is not tenant-scoped. In this mode, Himmelblau can accept authentication attempts for arbitrary Entra ID domains by dynamically registering providers at runtime. This behavior is intended for initial/local bootstrap scenarios, but it can create risk in remote authentication environments. This vulnerability is fixed in 3.1.0.

Affected (CNA)

Vendor / productVersions
himmelblau-idm / himmelblauaffected >= 3.0.0, < 3.1.0

CWE

CWE-1188

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.