{"cve":"CVE-2019-14859","nvd":{"published":"2020-01-02T15:15:11.960","modified":"2026-06-17T02:19:11.107","status":"Modified","description":"A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-347"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859","https://github.com/warner/python-ecdsa/issues/114","https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3","https://pypi.org/project/ecdsa/0.13.3/","https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859"],"products":["python-ecdsa_project:python-ecdsa","redhat:ceph_storage","redhat:openstack","redhat:virtualization"],"source":"nvd","synced_at":"2026-10-19T21:01:01.339895972+00:00"},"epss":{"cve":"CVE-2019-14859","score":0.01534,"percentile":0.74816,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8qxj-f9rh-9fg2","url":"https://osv.dev/vulnerability/GHSA-8qxj-f9rh-9fg2","summary":"Improper Verification of Cryptographic Signature in Pure-Python ECDSA","modified":"2025-02-21T05:41:36.293918Z","packages":[{"ecosystem":"PyPI","name":"ecdsa","purl":"pkg:pypi/ecdsa","ranges":["<0.13.3"],"fixed":["0.13.3"]}]},{"id":"PYSEC-2020-163","url":"https://osv.dev/vulnerability/PYSEC-2020-163","summary":"","modified":"2023-11-08T04:01:11.569013Z","packages":[{"ecosystem":"PyPI","name":"ecdsa","purl":"pkg:pypi/ecdsa","ranges":["<0.13.3"],"fixed":["0.13.3"]}]}],"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."]}