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CVE-2026-59243

Apache Airflow FAB provider · Vulnerability

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-59243

Published

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`.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-59243

Published

apache-airflow-providers-fab

https://pypi.python.org

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/apache-airflow-providers-fab",
                    "product": "Apache Airflow FAB provider",
                    "vendor": "Apache Software Foundation",
                    "versions": [
                        {
                            "lessThan": "3.7.3",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
                        }
                    ],
                    "collectionURL": "https://pypi.python.org",
                    "packageName": "apache-airflow-providers-fab"
                }

Original source record · Cite this exact observation · Complete original publisher JSON