CVE-2026-45108
Auth bypass in Himmelblau DAG flow enables user impersonation.
Is CVE-2026-45108 being exploited?
Not confirmed. CVE-2026-45108 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-45108?
CVE-2026-45108 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45108?
Yes. A fix has been recorded for CVE-2026-45108. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45108 affect?
CVE-2026-45108 affects Himmelblau interoperability suite (Azure Entra ID & Intune), Versions pre-3.1.5 and pre-2.3.11. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45108?
Upgrade to 3.1.5 or 2.3.11+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Impersonation: attacker in same Entra ID can obtain a local Unix session of another user due to incomplete username validation in token_validate.
Patch when possible
- affected>= 2.0.0 and < 2.3.11
- affected>= 3.0.0-alpha and < 3.1.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.