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.
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Affected Vendors & Products
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History
Thu, 12 Mar 2026 20:15:00 +0000
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ssvc
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Thu, 12 Mar 2026 10:15:00 +0000
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Himmelblau-idm
Himmelblau-idm himmelblau |
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Himmelblau-idm
Himmelblau-idm himmelblau |
Wed, 11 Mar 2026 19:45:00 +0000
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| 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. | |
| Title | Himmelblau unset domain configuration can allow any-tenant authentication at first login for remote deployments | |
| Weaknesses | CWE-1188 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-11T19:25:21.230Z
Updated: 2026-03-12T20:00:41.000Z
Reserved: 2026-03-10T15:40:10.480Z
Link: CVE-2026-31957
Updated: 2026-03-12T20:00:37.797Z
Status : Awaiting Analysis
Published: 2026-03-11T20:16:16.447
Modified: 2026-03-12T21:08:22.643
Link: CVE-2026-31957
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