Security advisory

{
  "id": "11d9419508bd446a0a4fe7f3a9b624302a76a0af9dacdd72a9eaf55c07014d77",
  "url": "https://osv.dev/vulnerability/CVE-2020-15899",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-15899",
    "summary": "Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.",
    "evidence": "osv:CVE-2020-15899",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-15899",
      "aliases": [
        "CVE-2020-15899",
        "GHSA-p75g-gcv5-42qg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mimblewimble/grin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4704037848261e09fe342469e31396eb205d8408"
                },
                {
                  "fixed": "7abe9fcb392162edf563156d6e6827cce31867a1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:grin:grin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "4.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15899.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:57.495082555Z",
      "provider": "osv",
      "references": [
        "https://github.com/mimblewimble/grin/compare/v3.1.1...v4.0.0",
        "https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-15899.md"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-15899",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383163,
  "published_at": "2020-07-28T18:15:20.787+00:00"
}