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TI-2026-52804 Aliases CVE-2026-75156GHSA-vrqc-p75r-25rv

Origin validation error in Apache Airflow FAB provider

Priority MEDIUM 47CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-346.

Summary

Apache Airflow FAB provider versions 3.7.3 through 3.8.0 do not validate the issuer or audience of Azure AD `id_token`s during OAuth login. Deployments are affected only when the FAB auth manager is configured with Azure AD as an OAuth provider. Because the signing keys are fetched from Microsoft's **multi-tenant** JWKS endpoint, an `id_token` minted in *any* Azure tenant — including one the attacker creates — passes signature verification, and the username and role assignments are then read from that attacker-controlled token. Anyone able to register an Azure tenant can therefore authenticate to the Airflow UI with no prior access to the deployment. The fix for **CVE-2026-59243** was incomplete, and this advisory closes the remaining gap: that fix made the provider verify the `id_token` signature, but did not add issuer or audience checks. Operators who already applied the CVE-2026-59243 fix are **still affected and must upgrade again** — 3.7.3 is the release that shipped that fix, so every version containing it falls inside this affected range. Upgrade to apache-airflow-providers-fab `3.8.1` or later.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00379 32nd percentileScored 2026-11-07
Fix Fixed Apache Airflow FAB provider (Apache Software Foundation): 3.8.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflow FAB provider3.7.3 to before 3.8.13.8.1Patch availableCNA
  • Apache Airflow FAB provider VendorApache Affected 3.7.3 to before 3.8.1 Fixed in 3.8.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:*3.7.3 to before 3.8.1VulnerableApache
  • cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:* Versions 3.7.3 to before 3.8.1 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow FAB provider (Apache Software Foundation) Fixed in 3.8.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-75156
  2. 2026-10-03 Alias added: GHSA-vrqc-p75r-25rv

References

Patch 1

Advisory 2

  • TI-2026-56769 Insufficient session expiration in Apache Airflow FAB provider CVSS 3.1CRITICAL 9.8
  • TI-2024-28416 Apache Airflow Providers FAB: FAB provider 1.2.1 and 1.2.0 did not let user to logout for Airflow CVSS 3.1CRITICAL 9.8
  • TI-2026-42383 Improper signature verification in Apache Airflow FAB provider CVSS 3.1CRITICAL 9.8
  • TI-2026-59161 Apache Airflow FAB provider: FAB Admin password PATCH does not invalidate database-backed sessions CVSS 3.1CRITICAL 9.1
  • TI-2024-30146 Apache Airflow Fab Provider: Application does not invalidate session after password change via Airflow cli CVSS 3.1HIGH 8.1
  • TI-2026-42385 Improper privilege management in Apache Airflow FAB provider CVSS 3.1HIGH 8.1
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences