{"cve":"CVE-2021-23364","nvd":{"published":"2021-04-28T16:15:08.133","modified":"2026-06-17T03:38:37.747","status":"Modified","description":"The package browserslist from 4.0.0 and before 4.16.5 are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.","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:L","score":5.3},"cwes":["CWE-1333"],"references":["https://github.com/browserslist/browserslist/blob/e82f32d1d4100d6bc79ea0b6b6a2d281a561e33c/index.js%23L472-L474","https://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98","https://github.com/browserslist/browserslist/pull/593","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1277182","https://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194"],"products":["browserslist_project:browserslist"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-23364","score":0.02383,"percentile":0.83911,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-w8qv-6jwh-64r5","url":"https://osv.dev/vulnerability/GHSA-w8qv-6jwh-64r5","summary":"Regular Expression Denial of Service in browserslist","modified":"2026-09-10T03:49:05.350597377Z","packages":[{"ecosystem":"npm","name":"browserslist","purl":"pkg:npm/browserslist","ranges":[">=4.0.0 <4.16.5"],"fixed":["4.16.5"]}]}],"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."]}