Security advisory

{
  "id": "cebeea5c45f27bdfb45791f2529238fa8099c15e961e962db54606f66df09bd4",
  "url": "https://osv.dev/vulnerability/CVE-2019-14859",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-14859",
    "summary": "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.",
    "evidence": "osv:CVE-2019-14859",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2019-14859",
      "aliases": [
        "CVE-2019-14859",
        "GHSA-8qxj-f9rh-9fg2",
        "PYSEC-2020-163"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tlsfuzzer/python-ecdsa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7add2213c992f51267eed8288b560f3f4108a28d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:python-ecdsa_project:python-ecdsa:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.13.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7add2213c992f51267eed8288b560f3f4108a28d"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "python-ecdsa-0.13.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "python-ecdsa-0.13.2",
            "python-ecdsa-0.13.1",
            "python-ecdsa-0.13",
            "python-ecdsa-0.12",
            "python-ecdsa-0.11",
            "python-ecdsa-0.10",
            "python-ecdsa-0.9",
            "python-ecdsa-0.8",
            "python-ecdsa-0.7",
            "python-ecdsa-0.6",
            "python-ecdsa-0.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-14859.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:43.819384175Z",
      "provider": "osv",
      "references": [
        "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",
        "https://github.com/warner/python-ecdsa/issues/114"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:redhat:ceph_storage:2.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:redhat:ceph_storage:3.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:ceph_storage",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.0"
                  },
                  {
                    "last_affected": "2.0"
                  },
                  {
                    "introduced": "3.0"
                  },
                  {
                    "last_affected": "3.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*",
              "cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*",
              "cpe:2.3:a:redhat:openstack:14:*:*:*:*:*:*:*",
              "cpe:2.3:a:redhat:openstack:15:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:openstack",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10"
                  },
                  {
                    "last_affected": "10"
                  },
                  {
                    "introduced": "13"
                  },
                  {
                    "last_affected": "13"
                  },
                  {
                    "introduced": "14"
                  },
                  {
                    "last_affected": "14"
                  },
                  {
                    "introduced": "15"
                  },
                  {
                    "last_affected": "15"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:virtualization",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0"
                  },
                  {
                    "last_affected": "4.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-14859",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382079,
  "published_at": "2020-01-02T15:15:11.96+00:00"
}