The FAB auth manager's Azure AD OAuth login defaulted `verify_signature=False`
Summary
The FAB auth manager's Azure AD OAuth login defaulted `verify_signature=False` when decoding the ID token, so an attacker able to present a forged or unsigned (`alg:none`) ID token to the OAuth callback could bypass authentication and log in as an arbitrary user, including one holding the Admin role (CWE-347). Deployments running the FAB auth manager with the Azure AD OAuth login path under its default configuration are affected; the Authentik path already defaulted to `True`. This issue affects `apache-airflow-providers-fab` before 3.7.3. Users are advised to upgrade to `apache-airflow-providers-fab` 3.7.3, which defaults `verify_signature=True`.
What this means
In plain English
The FAB auth manager's Azure AD OAuth login defaulted `verify_signature=False` when decoding the ID token, so an attacker able to present a forged or unsigned (`alg:none`) ID token to the OAuth callback could bypass authentication and log in as an arbitrary user, including one holding the Admin role (CWE-347). Deployments running the FAB auth manager with the Azure AD OAuth login path under its default configuration are affected; the Authentik path already defaulted to `True`. This issue affects `apache-airflow-providers-fab` before 3.7.3.
Recommended action
Primary action: update to a vendor-listed fixed release: 3.7.3. Vendor mitigation: Users are advised to upgrade to `apache-airflow-providers-fab` 3.7.3, which defaults `verify_signature=True`.
Rewritten locally from the scraped official advisory data above; no generative API is used. The vendor advisory is authoritative.
- 3.7.3
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
- 3.7.3
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
- Users are advised to upgrade to `apache-airflow-providers-fab` 3.7.3, which defaults `verify_signature=True`.
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
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