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CVE-2026-31979 PUBLISHED CVSS 8.800000190734863 HIGH

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Prior to 3.1.0 and 2.3.8, the himmelblaud-tasks daemon, running as root, writes Kerberos cache files under /tmp/krb5cc_<uid> without symlink protections. Since commit 87a51ee, PrivateTmp is explicitly removed from the tasks daemon's systemd hardening, exposing it to the host /tmp. A local user can exploit this via symlink attacks to chown or overwrite arbitrary files, achieving local privilege escalation. This vulnerability is fixed in 3.1.0 and 2.3.8.

EPSS 0.02% · 3.9th percentile

Risk Scores

CVSS v3.1
8.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.02%
3.9th percentile

Affected Products

VendorProductVersions
himmelblau-idmhimmelblau>= 1.0.0, < 2.3.8, >= 3.0.0-alpha, < 3.1.0, 1.0.0

Timeline

References

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