Origin Validation Error Affecting apache-airflow-providers-fab package, versions [,3.9.0rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-APACHEAIRFLOWPROVIDERSFAB-19865630
- published16 Sept 2026
- disclosed16 Sept 2026
- creditRitik Chaddha & NEO by ProjectDiscovery
Introduced: 16 Sep 2026
NewCVE-2026-86466 (opens in a new tab)How to fix?
Upgrade apache-airflow-providers-fab to version 3.9.0rc1 or higher.
Overview
apache-airflow-providers-fab is a Provider package apache-airflow-providers-fab for Apache Airflow
Affected versions of this package are vulnerable to Origin Validation Error in the id_token validation. An attacker can gain unauthorized access by presenting a valid token issued for a different client application by the same identity provider, as the issuer and audience claims are not checked.
Note: This is only exploitable if the same Authentik instance is used to serve multiple applications and the attacker possesses a valid token for any of those other applications.