Security advisory

{
  "id": "5a6eb1d43bd9e55dda0da2b617e80ef213713d63646cc3fb06ab9774553e8fb7",
  "url": "https://osv.dev/vulnerability/CVE-2020-12439",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-12439",
    "summary": "Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.",
    "evidence": "osv:CVE-2020-12439",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-12439",
      "aliases": [
        "CVE-2020-12439",
        "GHSA-6x52-88cq-55q5"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mimblewimble/grin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "533da2d192e0502c8b8251619176f1dd4a57a796"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:grin:grin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.1.0-beta.3",
            "v3.1.0-beta.2",
            "v3.1.0-beta.1",
            "v3.0.0-beta.3",
            "v3.0.0-beta.2",
            "v3.0.0-beta.1",
            "v2.1.0-beta.3",
            "v2.1.0-beta.2",
            "v2.1.0-beta.1",
            "v2.0.0",
            "2.0.0-beta.2",
            "v1.1.0",
            "v1.1.0-beta.2",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.2",
            "0.4.0",
            "0.0.0-pre.0.3.0.t3",
            "0.0.0-pre.0.3.0.1",
            "0.0.0-pre.0.3.0",
            "release_test_1",
            "testnet3",
            "testnet2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12439.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:46.256944846Z",
      "provider": "osv",
      "references": [
        "https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md",
        "https://github.com/mimblewimble/grin/issues/3235",
        "https://github.com/mimblewimble/grin/pull/3236"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-12439",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382915,
  "published_at": "2020-05-05T22:15:12.933+00:00"
}