Medium 4.4Published Sep 9, 2025

CVE-2025-59044Himmelblau vulnerable to GID collision via group name-derived mapping (privilege escalation)

Updated under an hour ago (Oct 27, 2026, 10:30 PM ET)

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Every CVE for himmelblau-idm himmelblau

Exploited in the last 30 days

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Himmelblau 0.9.x derives numeric GIDs for Entra ID groups from the group display name when himmelblau.conf `id_attr_map = name` (the default configuration). Because Microsoft Entra ID allows multiple groups with the same `displayName` (including end-user–created personal/O365 groups, depending on tenant policy), distinct directory groups can collapse to the same numeric GID on Linux. This issue only applies to Himmelblau versions 0.9.0 through 0.9.22. Any resource or service on a Himmelblau-joined host that enforces authorization by numeric GID (files/dirs, etc.) can be unintentionally accessible to a user who creates or joins a different Entra/O365 group that happens to share the same `displayName` as a privileged security group. Users should upgrade to 0.9.23, or 1.0.0 or later, to receive a patch. Group to GID mapping now uses Entra ID object IDs (GUIDs) and does not collide on same-name groups. As a workaround, use tenant policy hardening to restrict arbitrary group creation until all hosts are patched.

CVSS: 4.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-1188
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 10, 2025
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

himmelblau-idm himmelblau himmelblau_idm:himmelblau (from the name)	from 0.9.0, < 0.9.23	CNA record

References

References

https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-2m43-mmg9-3rgc	x-refsource-confirm
https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-gcxr-m95v-qcf7	x-refsource-misc
https://github.com/himmelblau-idm/himmelblau/commit/76c5b41df7f89378af65dc7c0d0484d7d41b3281	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.