{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.3.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7020a72bca9765d08a6e91f2fd1152c0012c426c"
            },
            {
              "fixed": "8f04eb9db02de708f1a20f6f2d2bb309b2fed01e"
            }
          ],
          "repo": "https://github.com/typestack/class-transformer",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.",
  "id": "CVE-2020-7637",
  "modified": "2026-03-13T21:55:36.304232695Z",
  "published": "2020-04-06T13:15:12.550Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e"
    },
    {
      "type": "EVIDENCE",
      "url": "https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431"
    }
  ],
  "related": [
    "SNYK-JS-CLASSTRANSFORMER-564431"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}