{"id":"GHSA-wx77-rp39-c6vg","aliases":[],"url":"https://o3.security/vulnerability/GHSA-wx77-rp39-c6vg","summary":"Regular Expression Denial of Service in markdown","details":"All versions of `markdown` are vulnerable to Regular Expression Denial of Service (ReDoS). The `markdown.toHTML()` function has significantly degraded performance when parsing long strings containing underscores. This may lead to Denial of Service if the parser accepts user input.\n\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative package until a fix is made available.","published":"2020-09-04T15:11:03Z","modified":"2026-02-04T03:45:28.715230Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"markdown","fixedVersion":null}],"fix":null,"references":[{"type":"PACKAGE","url":"https://github.com/evilstreak/markdown-js"},{"type":"WEB","url":"https://www.npmjs.com/advisories/1330"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-02-04T03:45:28.715230Z"}}