{"id":"CVE-2020-1920","aliases":["GHSA-7f53-fmmv-mfjv"],"url":"https://o3.security/vulnerability/CVE-2020-1920","summary":"Regular expression denial of service in react-native","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.","published":"2021-06-01T14:15:08.347Z","modified":"2026-08-27T08:39:44.515802Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"react-native","fixedVersion":"0.62.3"},{"ecosystem":"npm","name":"react-native","fixedVersion":"0.64.1"}],"fix":{"url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","label":"facebook/react-native@ca09ae8"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T08:39:44.515802Z"}}