{"api_version":"1","generated_at":"2026-07-23T10:50:35+00:00","cve":"CVE-2020-1920","urls":{"html":"https://cve.report/CVE-2020-1920","api":"https://cve.report/api/cve/CVE-2020-1920.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-1920","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-1920"},"summary":{"title":"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.","state":"PUBLIC","assigner":"cve-assign@fb.com","published_at":"2021-06-01 14:15:00","updated_at":"2022-10-06 03:04:00"},"problem_types":["CWE-697"],"metrics":[],"references":[{"url":"https://github.com/facebook/react-native/releases/tag/v0.64.1","name":"https://github.com/facebook/react-native/releases/tag/v0.64.1","refsource":"CONFIRM","tags":[],"title":"Release v0.64.1 · facebook/react-native · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","name":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","refsource":"MISC","tags":[],"title":"Update validateBaseUrl to use latest regex · facebook/react-native@ca09ae8 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1920","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1920","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"1920","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"facebook","cpe5":"react-native","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-1920","qid":"981998","title":"Nodejs (npm) Security Update for react-native (GHSA-7f53-fmmv-mfjv)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve-assign@fb.com","DATE_ASSIGNED":"2020-12-11","ID":"CVE-2020-1920","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Facebook","product":{"product_data":[{"product_name":"react-native","version":{"version_data":[{"version_affected":"!>=","version_value":"0.64.1"},{"version_affected":">=","version_value":"0.59.0"}]}}]}}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-1333: Inefficient Regular Expression Complexity"}]}]},"references":{"reference_data":[{"refsource":"CONFIRM","name":"https://github.com/facebook/react-native/releases/tag/v0.64.1","url":"https://github.com/facebook/react-native/releases/tag/v0.64.1"},{"refsource":"MISC","name":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7","url":"https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7"}]}},"nvd":{"publishedDate":"2021-06-01 14:15:00","lastModifiedDate":"2022-10-06 03:04:00","problem_types":["CWE-697"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:facebook:react-native:*:*:*:*:*:*:*:*","versionStartIncluding":"0.59.0","versionEndExcluding":"0.64.1","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"1920","Ordinal":"161302","Title":"CVE-2020-1920","CVE":"CVE-2020-1920","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"1920","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"1920","Ordinal":"2","NoteData":"2021-06-01","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"1920","Ordinal":"3","NoteData":"2021-06-01","Type":"Other","Title":"Modified"}]}}}