{"id":"CVE-2020-1920","aliases":["EUVD-2021-1447","GHSA-7f53-fmmv-mfjv"],"status":"published","title":"Regular expression denial of service in react-native","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01363,"percentile":0.71982,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333","CWE-400","CWE-697"],"published":"2021-06-01T11:45:12Z","modified":"2026-10-20T13:52:41Z","fixes":[{"ecosystem":"npm","package":"react-native","fixed_in":["0.62.3","0.64.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"react-native","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.59.0"},{"fixed":"0.62.3"}]}]},{"source":"ghsa","ecosystem":"npm","package":"react-native","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.63.0"},{"fixed":"0.64.1"}]}]},{"source":"osv","ecosystem":"npm","package":"react-native","ranges":[{"type":"SEMVER","events":[{"introduced":"0.59.0"},{"fixed":"0.62.3"}]}]},{"source":"osv","ecosystem":"npm","package":"react-native","ranges":[{"type":"SEMVER","events":[{"introduced":"0.63.0"},{"fixed":"0.64.1"}]}]}],"products":[{"vendor":"facebook","product":"react-native"}],"references":[{"url":"https://github.com/facebook/react-native/releases/tag/v0.64.1","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1920","tags":["advisory"]},{"url":"https://www.npmjs.com/package/react-native","tags":["web"]},{"url":"https://github.com/facebook/react-native/releases/tag/v0.62.3","tags":["web"]},{"url":"https://securitylab.github.com/advisories/GHSL-2020-293-redos-react-native/"},{"url":"https://github.com/advisories/GHSA-7f53-fmmv-mfjv"},{"url":"https://securitylab.github.com/advisories/GHSL-2020-293-redos-react-native","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2020-1920","description":"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.","status":"published","published":"2021-06-01T11:45:12Z","modified":"2024-08-04T06:54:00.363Z","cwes":["CWE-1333"],"updated_at":"2026-11-02T14:35:56.638833Z"}],"euvd":[{"id":"EUVD-2021-1447","description":"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.","status":"published","published":"2021-06-01T11:45:12Z","modified":"2024-08-04T06:54:00Z","updated_at":"2026-11-03T03:08:10.95725Z"}],"ghsa":[{"id":"GHSA-7f53-fmmv-mfjv","title":"Regular expression denial of service in react-native","description":"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.","status":"published","published":"2021-07-20T17:33:28Z","modified":"2023-01-27T05:05:08Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-697"],"updated_at":"2026-11-02T14:36:21.8171Z"}],"nvd":[{"id":"CVE-2020-1920","description":"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.","status":"published","published":"2021-06-01T14:15:08.347Z","modified":"2026-06-17T03:02:37.027Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-1333","CWE-697"],"updated_at":"2026-11-02T14:06:43.288951Z"}],"osv":[{"id":"CVE-2020-1920","description":"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.","status":"published","published":"2021-06-01T14:15:08.347Z","modified":"2026-10-20T13:52:41.996984245Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"GHSA-7f53-fmmv-mfjv","title":"Regular expression denial of service in react-native","description":"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.","status":"published","published":"2021-07-20T17:33:28Z","modified":"2023-11-08T04:02:45.376849Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-697"],"updated_at":"2026-11-02T15:46:41.002603Z"}]}}