cvedb.io
CVE-2026-31957
CRITICAL · CVSS 10
EPSS exploitation probability: 0%
Published 2026-03-11T20:16:16.447 · Last modified 2026-06-17T10:34:50.363

Summary

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 products

himmelblau-idm — himmelblau

Does this affect you?

Add your gear to cvedb and we'll alert you only when himmelblau-idm ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.