{"id":"GHSA-w8qv-6jwh-64r5","summary":"Regular Expression Denial of Service in browserslist","details":"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.","aliases":["CVE-2021-23364"],"modified":"2026-07-17T21:12:36.100222491Z","published":"2021-05-24T19:52:40Z","database_specific":{"github_reviewed_at":"2021-05-20T22:03:36Z","nvd_published_at":"2021-04-28T16:15:00Z","cwe_ids":["CWE-1333","CWE-400"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23364"},{"type":"WEB","url":"https://github.com/browserslist/browserslist/pull/593"},{"type":"WEB","url":"https://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98"},{"type":"WEB","url":"https://github.com/browserslist/browserslist/blob/e82f32d1d4100d6bc79ea0b6b6a2d281a561e33c/index.js%23L472-L474"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1277182"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194"}],"affected":[{"package":{"name":"browserslist","ecosystem":"npm","purl":"pkg:npm/browserslist"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.16.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-w8qv-6jwh-64r5/GHSA-w8qv-6jwh-64r5.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}