{"affected":[{"affectedData":[{"product":"react-native","vendor":"Facebook","versions":[{"lessThan":"unspecified","status":"unaffected","version":"0.64.1","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"0.59.0","versionType":"custom"}]}],"source":"cve-assign@fb.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:facebook:react-native:*:*:*:*:*:*:*:*","matchCriteriaId":"1ACBCF98-25B8-4F9C-A53F-0BC1991FB485","versionEndExcluding":"0.64.1","versionStartIncluding":"0.59.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"Una vulnerabilidad de Denegación de Servicio de expresión regular (ReDoS) en la función validateBaseUrl puede hacer que la aplicación utilice recursos excesivos, deje de responder o se bloquee. Esto se introdujo en versión 0.59.0 de react-native y se corrigió en versión 0.64.1"}],"id":"CVE-2020-1920","lastModified":"2026-06-17T03:02:37.027","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":5.0,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","version":"2.0"},"exploitabilityScore":10.0,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-06-01T14:15:08.347","references":[{"source":"cve-assign@fb.com","tags":["Patch","Third Party Advisory"],"url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7"},{"source":"cve-assign@fb.com","tags":["Release Notes","Third Party Advisory"],"url":"https://github.com/facebook/react-native/releases/tag/v0.64.1"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"],"url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Third Party Advisory"],"url":"https://github.com/facebook/react-native/releases/tag/v0.64.1"}],"sourceIdentifier":"cve-assign@fb.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-1333"}],"source":"cve-assign@fb.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-697"}],"source":"nvd@nist.gov","type":"Primary"}]}