Security advisory

{
  "id": "e4157ac951d539f9f79a11a71ee97749f5d90dd07b171f963e53fcf4da45c4df",
  "url": "https://osv.dev/vulnerability/CVE-2026-12566",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-12566",
    "summary": "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.",
    "evidence": "osv:CVE-2026-12566",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-12566",
      "aliases": [
        "CVE-2026-12566",
        "GHSA-3mp7-vp6j-2mxx",
        "PYSEC-2026-2391"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/blacklanternsecurity/bbot",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c2f4bc0f4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "c2f4bc0f4"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12566.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.939462413Z",
      "provider": "osv",
      "references": [
        "https://github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-12566",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496516,
  "published_at": "2026-06-17T23:17:03.1+00:00"
}