{"id":"CVE-2026-111758","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-111758","generatedAt":"2026-10-28T06:36:03.477Z","title":"markdown-it is a Markdown parser.","description":"markdown-it is a Markdown parser. From versions 14.1.0 to before 14.3.3, and 15.0.0 to before 15.0.3, a link reference definition whose label or title is never closed is O(n²) with default options. Continuation lines are pulled lazily with str += lineContent in src/rules_block/reference.ts, and the subsequent charCodeAt and slice calls flatten the V8 cons-string, copying everything collected so far; this runs before the rule decides the definition is invalid. No options are required to trigger it. This issue has been patched in versions 14.3.3 and 15.0.3.","published":"2026-10-20T21:17:17.000Z","lastModified":"2026-10-22T16:47:38.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400","CWE-407"],"affected":[],"epss":{"score":0.00455,"percentile":0.39329,"date":"2026-10-27","history":[{"date":"2026-10-21","score":0.00455,"percentile":0.38456}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T21:17:17.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-20T21:17:17.110Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/markdown-it/markdown-it/commit/48fbc465812c440020c663f040ab22deaf8f1eca","source":"security-advisories@github.com"},{"url":"https://github.com/markdown-it/markdown-it/commit/d99f48839d37af6fd8a2617516c43dab90755503","source":"security-advisories@github.com"},{"url":"https://github.com/markdown-it/markdown-it/releases/tag/14.3.3","source":"security-advisories@github.com"},{"url":"https://github.com/markdown-it/markdown-it/releases/tag/15.0.3","source":"security-advisories@github.com"},{"url":"https://github.com/markdown-it/markdown-it/security/advisories/GHSA-gfr2-rv44-r23c","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-111758","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}