CVE-2026-12566

Full vulnerability record from the local CVENow database.

Description

The docker_pull module uses the realm parameter from a Docker registry's WWW-Authenticate response header as the authentication endpoint without validation. An attacker in a man-in-the-middle position between bbot and a Docker registry could modify this header to redirect the authentication request to an arbitrary endpoint, potentially leaking authentication tokens.

Severity

LOW

CVSS score

3.1 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-06-17 23:17:03.100000

Last modified

2026-10-26 11:10:00.157000

View original CVE JSON

{
  "id": "CVE-2026-12566",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-17T23:17:03.100",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The docker_pull module uses the realm parameter from a Docker registry's WWW-Authenticate response header as the authentication endpoint without validation. An attacker in a man-in-the-middle position between bbot and a Docker registry could modify this header to redirect the authentication request to an arbitrary endpoint, potentially leaking authentication tokens."
    },
    {
      "lang": "es",
      "value": "El módulo docker_pull utiliza el parámetro realm del encabezado de respuesta WWW-Authenticate de un registro de Docker como el punto final de autenticación sin validación. Un atacante en una posición de man-in-the-middle entre bbot y un registro de Docker podría modificar este encabezado para redirigir la solicitud de autenticación a un punto final arbitrario, lo que podría filtrar tokens de autenticación."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Black Lantern Security",
          "product": "BBOT",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/blacklanternsecurity/bbot",
          "versions": [
            {
              "version": "2.0.0",
              "lessThanOrEqual": "<=2.8.4",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
          "baseScore": 3.1,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-18T12:50:29.407349Z",
          "id": "CVE-2026-12566",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4",
      "source": "[email protected]"
    }
  ]
}