What is CVE-2026-45108?

CVE-2026-45108 is a high-severity vulnerability in Himmelblau-idm Himmelblau, classified under Incorrect Authorization. CVSS score: 8.4/10. Published 2026-05-27.

How severe is CVE-2026-45108?

High severity. CVSS v3 base score is 8.4 out of 10.

Auth bypass in Himmelblau-idm Himmelblau

CVE-2026-45108

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…

Vulnerability class: Broken Access Control

EPSS: 0.001 (22.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L.

Affected products

Himmelblau-idm Himmelblau — versions >= 2.0.0, < 2.3.11, >= 3.0.0-alpha, < 3.1.5

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45108?: CVE-2026-45108 is a high-severity vulnerability in Himmelblau-idm Himmelblau, classified under Incorrect Authorization. CVSS score: 8.4/10. Published 2026-05-27.
How severe is CVE-2026-45108?: High severity. CVSS v3 base score is 8.4 out of 10.