Security advisory

{
  "id": "937991a7da5213285683d0aa836db8f1ade1fa986d177567ef9bb5dbd1e26199",
  "url": "https://osv.dev/vulnerability/CVE-2020-13822",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13822",
    "summary": "The Elliptic package 6.5.2 for Node.js allows ECDSA signature malleability via variations in encoding, leading '\\0' bytes, or integer overflows. This could conceivably have a security-relevant impact if an application relied on a single canonical signature.",
    "evidence": "osv:CVE-2020-13822",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-13822",
      "aliases": [
        "CVE-2020-13822",
        "GHSA-vh7m-p724-62c2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/indutny/elliptic",
              "type": "GIT",
              "events": [
                {
                  "introduced": "60489415e545efdfd3010ae74b9726facbf08ca8"
                },
                {
                  "last_affected": "60489415e545efdfd3010ae74b9726facbf08ca8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:indutny:elliptic:6.5.2:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "6.5.2"
                      },
                      {
                        "last_affected": "6.5.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.5.2",
            "v6.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13822.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:48.310913837Z",
      "provider": "osv",
      "references": [
        "https://medium.com/%40herman_10687/malleability-attack-why-it-matters-7b5f59fb99a4",
        "https://www.npmjs.com/package/elliptic",
        "https://yondon.blog/2019/01/01/how-not-to-use-ecdsa/",
        "https://github.com/indutny/elliptic/issues/226"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-13822",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382968,
  "published_at": "2020-06-04T15:15:13.51+00:00"
}