CVE-2026-59243

{
  "id": "CVE-2026-59243",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-29T10:16:44.390",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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`."
    },
    {
      "lang": "es",
      "value": "El inicio de sesión OAuth de Azure AD del gestor de autenticación FAB establecía por defecto “verify_signature=False” al decodificar el token de ID, por lo que un atacante capaz de presentar un token de ID falsificado o sin firmar (“alg:none”) a la devolución de llamada OAuth podría omitir la autenticación e iniciar sesión como un usuario arbitrario, incluyendo uno con el rol de Administrador (CWE-347). Las implementaciones que ejecutan el gestor de autenticación FAB con la ruta de inicio de sesión OAuth de Azure AD bajo su configuración predeterminada se ven afectadas; la ruta de Authentik ya establecía por defecto “True”. Este problema afecta a “apache-airflow-providers-fab” anterior a 3.7.3. Se aconseja a los usuarios actualizar a “apache-airflow-providers-fab” 3.7.3, que establece por defecto “verify_signature=True”."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Airflow FAB provider",
          "defaultStatus": "unaffected",
          "collectionURL": "https://pypi.python.org",
          "packageName": "apache-airflow-providers-fab",
          "packageURL": "pkg:pypi/apache-airflow-providers-fab",
          "versions": [
            {
              "version": "0",
              "lessThan": "3.7.3",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-29T15:29:52.670228Z",
          "id": "CVE-2026-59243",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:*",
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              "matchCriteriaId": "8594BF55-DBE6-418C-81A1-4B595EEE9DB7"
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  "references": [
    {
      "url": "https://github.com/apache/airflow/pull/69374",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://lists.apache.org/thread/x4784l7z00tl3gw4tv2dmvoon77rxgpl",
      "source": "[email protected]",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/07/28/10",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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    }
  ]
}