{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.1.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "533da2d192e0502c8b8251619176f1dd4a57a796"
            }
          ],
          "repo": "https://github.com/mimblewimble/grin",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.",
  "id": "CVE-2020-12439",
  "modified": "2026-03-13T21:48:20.483728882Z",
  "published": "2020-05-05T22:15:12.933Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md"
    },
    {
      "type": "FIX",
      "url": "https://github.com/mimblewimble/grin/issues/3235"
    },
    {
      "type": "FIX",
      "url": "https://github.com/mimblewimble/grin/pull/3236"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}