{"id":"CVE-2021-23368","aliases":["GHSA-hwj9-h5mp-3pm3"],"url":"https://o3.security/vulnerability/CVE-2021-23368","summary":"Regular Expression Denial of Service in postcss","details":"The package postcss from 7.0.0 and before 8.2.10 are vulnerable to Regular Expression Denial of Service (ReDoS) during source map parsing.","published":"2021-04-12T14:15:14.257Z","modified":"2026-08-07T15:13:58.916177Z","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":{"score":0.0354,"percentile":0.88406,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"npm","name":"postcss","fixedVersion":"7.0.36"},{"ecosystem":"npm","name":"postcss","fixedVersion":"8.2.10"}],"fix":{"url":"https://github.com/postcss/postcss/commit/8682b1e4e328432ba692bed52326e84439cec9e4","label":"postcss/postcss@8682b1e"},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r00158f5d770d75d0655c5eef1bdbc6150531606c8f8bcb778f0627be%40%3Cdev.myfaces.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r16e295b4f02d81b79981237d602cb0b9e59709bafaa73ac98be7cef1%40%3Cdev.myfaces.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r49afb49b38748897211b1f89c3a64dc27f9049474322b05715695aab%40%3Cdev.myfaces.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5acd89f3827ad9a9cad6d24ed93e377f7114867cd98cfba616c6e013%40%3Ccommits.myfaces.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r8def971a66cf3e375178fbee752e1b04a812a047cc478ad292007e33%40%3Cdev.myfaces.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rad5af2044afb51668b1008b389ac815a28ecea9eb75ae2cab5a00ebb%40%3Ccommits.myfaces.apache.org%3E"},{"type":"FIX","url":"https://github.com/postcss/postcss/commit/8682b1e4e328432ba692bed52326e84439cec9e4"},{"type":"FIX","url":"https://github.com/postcss/postcss/commit/b6f3e4d5a8d7504d553267f80384373af3a3dec5"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1244795"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JS-POSTCSS-1090595"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:13:58.916177Z"}}