Incorrect Authorization Affecting pam-himmelblau package, versions <2.3.11+git1.116c6763-160000.1.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.25% (16th percentile)

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  • Snyk IDSNYK-SLES1600-PAMHIMMELBLAU-17439329
  • published24 Jun 2026
  • disclosed19 Jun 2026

Introduced: 19 Jun 2026

CVE-2026-45108  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 pam-himmelblau to version 2.3.11+git1.116c6763-160000.1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pam-himmelblau package and not the pam-himmelblau package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From 2.0.0 to before 3.1.5 and 2.3.11, Himmelblau contained an authentication bypass vulnerability in the Device Authorization Grant (DAG) flow that allowed a user within the same Entra ID domain to obtain a local Unix session as another user by providing their own valid credentials. The vulnerability existed in the token_validate function, which validated domain aliases for legitimate multi-domain scenarios but failed to verify that the local part (username) of the authenticated user's UPN matched the requested account username. The function only compared domains, not the complete usernames. This vulnerability is fixed in 3.1.5 and 2.3.11.

CVSS Base Scores

version 3.1