Allows universal Azure-tenant token abuse to authenticate to Apache Airflow UI; affects widely used Airflow deployments and can grant immediate access to sensitive pipelines and admin functions.
CVE-2026-75156
Azure AD id_token issuer/audience not validated in Airflow FAB OAuth, enabling tenant-based login bypass
Is CVE-2026-75156 being exploited?
Not confirmed. CVE-2026-75156 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 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-75156?
CVE-2026-75156 is rated Critical with a CVSS score of 9.1. 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-2026-75156?
Yes. A fix has been recorded for CVE-2026-75156. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-75156 affect?
CVE-2026-75156 affects apache-airflow-providers-fab 3.7.3 - 3.8.0, Apache Airflow deployments using FAB auth with Azure AD OAuth. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-75156?
Upgrade apache-airflow-providers-fab to 3.8.1+ and verify Azure AD issuer/audience checks; rotate tokens/keys.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-crafted Azure id_token from any tenant can authenticate to Airflow UI, gain roles, access data, and perform admin actions.
Immediate action required
- affected>= 3.7.3 and < 3.8.1
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.