{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0.59.0"
              },
              {
                "fixed": "0.64.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "7c73f2bb5a0f97902f469bc043681e79e161aac3"
            },
            {
              "fixed": "787567a15014c73b87353b7d418c064c5643e7cc"
            },
            {
              "fixed": "ca09ae82715e33c9ac77b3fa55495cf84ba891c7"
            }
          ],
          "repo": "https://github.com/facebook/react-native",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A regular expression denial of service (ReDoS) vulnerability in the validateBaseUrl function can cause the application to use excessive resources, become unresponsive, or crash. This was introduced in react-native version 0.59.0 and fixed in version 0.64.1.",
  "id": "CVE-2020-1920",
  "modified": "2026-03-13T21:48:06.545617912Z",
  "published": "2021-06-01T14:15:08.347Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/facebook/react-native/releases/tag/v0.64.1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}