CVE-2026-34397

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From versions 2.0.0-alpha to before 2.3.9 and 3.0.0-alpha to before 3.1.1, there is a conditional local privilege escalation vulnerability in an edge-case naming collision. Only authenticated himmelblau users whose mapped CN/short name exactly matches a privileged local group name (e.g., "sudo", "wheel", "docker", "adm") can cause the NSS module to resolve that group name to their fake primary group. If the system uses NSS results for group-based authorization decisions (sudo, polkit, etc.), this can grant the attacker the privileges of that group. This issue has been patched in versions 2.3.9 and 3.1.1.

• CWE-269

• https://github.com/himmelblau-idm/himmelblau/releases/tag/2.3.9Product, Release Notes
• https://github.com/himmelblau-idm/himmelblau/releases/tag/3.1.1Product, Release Notes
• https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-v7xx-7mqc-g835Exploit, Mitigation, Vendor Advisory

Published

Apr 1, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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