CVE-2026-59243
Description
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.
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Affected products
3cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:*range: <3.7.3
- (no CPE)range: <3.7.3
Patches
Vulnerability mechanics
References
3- github.com/apache/airflow/pull/69374nvdPatch
- www.openwall.com/lists/oss-security/2026/07/28/10nvdMailing ListThird Party Advisory
- lists.apache.org/thread/x4784l7z00tl3gw4tv2dmvoon77rxgplnvdMailing ListVendor Advisory
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