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10.0
Himmelblau: Unsecured Authentication Exposes Data in Remote Environments
CVE-2026-31957
Summary
Himmelblau's authentication system is not properly configured for remote use, potentially allowing unauthorized access to Entra ID domains. This poses a risk to sensitive data. Update Himmelblau to version 3.1.0 to resolve the issue.
Original title
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, authent...
Original description
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.
nvd CVSS3.1
10.0
Vulnerability type
CWE-1188
Published: 11 Mar 2026 · Updated: 13 Mar 2026 · First seen: 11 Mar 2026