{"id":"CVE-2026-2327","aliases":["GHSA-38c4-r59v-3vqw"],"url":"https://o3.security/vulnerability/CVE-2026-2327","summary":"markdown-it is has a Regular Expression Denial of Service (ReDoS)","details":"Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.","published":"2026-02-12T05:00:07.369Z","modified":"2026-07-15T01:49:07.270312554Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"markdown-it","fixedVersion":"14.1.1"}],"fix":{"url":"https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26","label":"markdown-it/markdown-it@4b4bbca"},"references":[{"type":"WEB","url":"https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917"},{"type":"WEB","url":"https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2327.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2327"},{"type":"FIX","url":"https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:07.270312554Z"}}