Is CVE-2026-31979 actively exploited?

CVE-2026-31979 has no public evidence of in-the-wild exploitation as of 2026-03-16.

What is the CVSS score for CVE-2026-31979?

CVE-2026-31979 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

How do I patch CVE-2026-31979?

Patch guidance is available from himmelblau-idm security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-31979.

Fix CVE-2026-31979 - HIGH himmelblau-idm himmelblau

Q: Which products are affected by CVE-2026-31979?

2 products: himmelblau-idm himmelblau, himmelblau-idm himmelblau.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-59

Metadata

Primary Vendor: HIMMELBLAU-IDM
Published: 3/11/2026
Last Modified: 3/16/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-31979

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary