{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2.0.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "e8f5e592b864b341391c9becf80bbe3e0e930a33"
            }
          ],
          "repo": "https://github.com/zcash/zcash",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of these elements allowed a cheating prover to bypass a consistency check, and consequently transform the proof of one statement into an ostensibly valid proof of a different statement, thereby breaking the soundness of the proof system. This misled the original Sprout zk-SNARK verifier into accepting the correctness of a transaction.",
  "id": "CVE-2019-7167",
  "modified": "2026-03-13T21:49:48.177550790Z",
  "published": "2019-03-27T02:29:00.250Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/"
    },
    {
      "type": "ADVISORY",
      "url": "https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/JinBean/CVE-Extension"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}