{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:octopus:halibut:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.4.7"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b325aeb4cce5a9ff0b663c67ccabb3bd5d04cb34"
            }
          ],
          "repo": "https://github.com/octopusdeploy/halibut",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "In Halibut versions prior to 4.4.7 there is a deserialisation vulnerability that could allow remote code execution on systems that already trust each other based on certificate verification.",
  "id": "CVE-2021-31819",
  "modified": "2026-07-08T05:39:23.277849336Z",
  "published": "2021-09-22T02:15:09.593Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://advisories.octopus.com/adv/2021-08---Remote-Code-Execution-via-Deserialisation-in-the-Halibut-Protocol-%28CVE-2021-31819%29.2250309681.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}