{"id":"CVE-2020-36843","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-36843","generatedAt":"2026-10-27T20:21:52.316Z","title":"This allows attackers to create new valid signatures different from previous signatures for a known message.","description":"The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.","published":"2025-03-13T06:15:34.000Z","lastModified":"2026-06-17T03:16:19.000Z","status":"Deferred","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"},"cwe":["CWE-347"],"affected":[],"epss":{"score":0.00143,"percentile":0.03586,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://eprint.iacr.org/2020/1244","source":"cve@mitre.org"},{"url":"https://github.com/str4d/ed25519-java/issues/82#issue-727629226","source":"cve@mitre.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-36843","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}