What’s Vulnerable › Vulnerabilities

CVE-2025-54882: Himmelblau's Kerberos credential cache collection is world readable

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-07 · updated 2026-06-17
• Weakness: CWE-522

Description

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. In versions 0.8.0 through 0.9.21 and 1.0.0-beta through 1.1.0, Himmelblau stores the cloud TGT received during logon in the Kerberos credential cache. The created credential cache collection and received credentials are stored as world readable. This is fixed in versions 0.9.22 and 1.2.0. To work around this issue, remove all read access to Himmelblau caches for all users except for owners.

Affected products

• himmelblau-idm himmelblau: from 0.8.0 before 0.9.22; from 1.0.0 before 1.2.0 — fixed in 0.9.22, 1.2.0

How to fix

Upgrade to a fixed version: himmelblau-idm himmelblau 0.9.22, 1.2.0. Check the vendor advisory for mitigations.

References

• https://github.com/himmelblau-idm/himmelblau/commit/b562053df3dffb1dd9ab3d09af986886773be2ad
• https://github.com/himmelblau-idm/himmelblau/commit/faae58b0384aca8b21b4be5f1c507412eec3778a
• https://github.com/himmelblau-idm/himmelblau/releases/tag/0.9.22
• https://github.com/himmelblau-idm/himmelblau/releases/tag/1.2.0
• https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-phfx-rjfw-wj83
• https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-phfx-rjfw-wj83

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