What is CVE-2026-31979?

CVE-2026-31979 is a high-severity vulnerability in Himmelblau-idm Himmelblau, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2026-03-11.

How severe is CVE-2026-31979?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Himmelblau-idm Himmelblau

CVE-2026-31979

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. Sinc…

EPSS: 0.000 (6.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Himmelblau-idm Himmelblau — versions >= 1.0.0, < 2.3.8, >= 3.0.0-alpha, < 3.1.0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-31979?: CVE-2026-31979 is a high-severity vulnerability in Himmelblau-idm Himmelblau, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2026-03-11.
How severe is CVE-2026-31979?: High severity. CVSS v3 base score is 8.8 out of 10.