{"id":"CVE-2021-23364","aliases":["GHSA-w8qv-6jwh-64r5"],"url":"https://o3.security/vulnerability/CVE-2021-23364","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.","published":"2021-04-28T16:15:08.133Z","modified":"2026-07-15T06:19:13.785393Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"browserslist","fixedVersion":"4.16.5"}],"fix":{"url":"https://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98","label":"browserslist/browserslist@c091916"},"references":[{"type":"WEB","url":"https://github.com/browserslist/browserslist/blob/e82f32d1d4100d6bc79ea0b6b6a2d281a561e33c/index.js%23L472-L474"},{"type":"ADVISORY","url":"https://github.com/browserslist/browserslist/pull/593"},{"type":"FIX","url":"https://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1277182"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T06:19:13.785393Z"}}