{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-75156", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-08-17T18:58:02.812Z", "datePublished": "2026-09-08T16:47:48.290Z", "dateUpdated": "2026-09-08T16:47:48.290Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow-providers-fab", "product": "Apache Airflow FAB provider", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.8.1", "status": "affected", "version": "3.7.3", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Roberto Nunes"}, {"lang": "en", "type": "tool", "value": "NEO AI Engineer (@neo-ai-engineer, ProjectDiscovery)"}, {"lang": "en", "type": "remediation developer", "value": "Jarek Potiuk"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "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&#x27;s **multi-tenant** JWKS endpoint, an `id_token` minted in *any* Azure tenant \u2014 including one the attacker creates \u2014 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.<br><br>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** \u2014 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."}], "value": "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 \u2014 including one the attacker creates \u2014 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.\n\nThe 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** \u2014 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."}], "metrics": [{"other": {"content": {"text": "moderate"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-346", "description": "CWE-346: Origin Validation Error", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-08T16:47:48.290Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/apache/airflow/pull/71735"}, {"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/n3l6z4jfdxj4p0t8l7m6olkq6xsc6f76"}, {"tags": ["related"], "url": "https://www.cve.org/CVERecord?id=CVE-2026-59243"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache Airflow FAB provider: FAB Azure AD OAuth: id_token issuer/audience not validated \u2014 cross-tenant authentication bypass", "x_generator": {"engine": "airflow-s/generate_cve_json.py"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow-providers-fab", "product": "Apache Airflow FAB provider", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.8.1", "status": "affected", "version": "3.7.3", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 \u2014 including one the attacker creates \u2014 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.\n\nThe 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** \u2014 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."}], "id": "CVE-2026-75156", "lastModified": "2026-09-08T18:36:02.963", "metrics": {}, "published": "2026-09-08T17:18:30.393", "references": [{"source": "security@apache.org", "url": "https://github.com/apache/airflow/pull/71735"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread/n3l6z4jfdxj4p0t8l7m6olkq6xsc6f76"}, {"source": "security@apache.org", "url": "https://www.cve.org/CVERecord?id=CVE-2026-59243"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "security@apache.org", "type": "Primary"}]}

{}

{}