{"cve":"CVE-2020-1920","nvd":{"published":"2021-06-01T14:15:08.347","modified":"2026-06-17T03:02:37.027","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-697","CWE-1333"],"references":["https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","https://github.com/facebook/react-native/releases/tag/v0.64.1","https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","https://github.com/facebook/react-native/releases/tag/v0.64.1"],"products":["facebook:react-native"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2020-1920","score":0.01363,"percentile":0.71788,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7f53-fmmv-mfjv","url":"https://osv.dev/vulnerability/GHSA-7f53-fmmv-mfjv","summary":"Regular expression denial of service in react-native","modified":"2023-11-08T04:02:45.376849Z","packages":[{"ecosystem":"npm","name":"react-native","purl":"pkg:npm/react-native","ranges":[">=0.59.0 <0.62.3"],"fixed":["0.62.3"]},{"ecosystem":"npm","name":"react-native","purl":"pkg:npm/react-native","ranges":[">=0.63.0 <0.64.1"],"fixed":["0.64.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}