{"cve":"CVE-2020-13822","nvd":{"published":"2020-06-04T15:15:13.510","modified":"2026-06-17T02:53:43.477","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","score":7.7},"cwes":["CWE-190"],"references":["https://github.com/indutny/elliptic/issues/226","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"],"products":["indutny:elliptic"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-13822","score":0.02705,"percentile":0.8596,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-vh7m-p724-62c2","url":"https://osv.dev/vulnerability/GHSA-vh7m-p724-62c2","summary":"Signature Malleabillity in elliptic","modified":"2024-10-16T17:02:45Z","packages":[{"ecosystem":"npm","name":"elliptic","purl":"pkg:npm/elliptic","ranges":["<6.5.3"],"fixed":["6.5.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}