CVE-2026-55106

{
  "id": "CVE-2026-55106",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T17:16:59.500",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, a diagnostic action on the LDAP Source API does not enforce the object-level read-authorization filter used by the rest of the API. Any party able to reach the API, including an unauthenticated client, can invoke the diagnostic action against a configured LDAP Source. The server then connects to the upstream directory using the source's configured bind credentials and returns a bounded set of directory entries. The response exposes the distinguished names of those entries and the names of the attributes present on them, revealing directory structure, naming conventions, and the existence of specific accounts and groups, but not attribute values. Deployments without a configured LDAP Source are not affected. This issue is fixed in versions 2026.2.6 and 2026.5.5."
    },
    {
      "lang": "es",
      "value": "authentik es un proveedor de identidad de código abierto. Antes de 2026.2.6 y 2026.5.5, una acción de diagnóstico en la API de origen LDAP no aplica el filtro de autorización de lectura a nivel de objeto utilizado por el resto de la API. Cualquier parte capaz de alcanzar la API, incluyendo un cliente no autenticado, puede invocar la acción de diagnóstico contra un origen LDAP configurado. El servidor luego se conecta al directorio ascendente utilizando las credenciales de enlace configuradas del origen y devuelve un conjunto limitado de entradas de directorio. La respuesta expone los nombres distinguidos de esas entradas y los nombres de los atributos presentes en ellas, revelando la estructura del directorio, las convenciones de nomenclatura y la existencia de cuentas y grupos específicos, pero no los valores de los atributos. Las implementaciones sin un origen LDAP configurado no se ven afectadas. Este problema está solucionado en las versiones 2026.2.6 y 2026.5.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "goauthentik",
          "product": "authentik",
          "versions": [
            {
              "version": "< 2026.2.6",
              "status": "affected"
            },
            {
              "version": ">= 2026.5.0, < 2026.5.5",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T19:07:03.199464Z",
          "id": "CVE-2026-55106",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/goauthentik/authentik/commit/e638de23217480854ec5e48ca6fceae479321f99",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/commit/fc336da4bd32bef52800c77d91aa0b82c5533041",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/pull/24055",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/pull/24060",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.2.6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.5.5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-h8ff-c3h7-2gf8",
      "source": "[email protected]"
    }
  ]
}