{"schemaVersion":3,"id":"CVE-2026-111758","aliases":["GHSA-gfr2-rv44-r23c","CGA-r5pp-p993-mg9g","CGA-p83r-vmv8-2m6h","CGA-q9hm-7x5p-8m9v","CGA-cfh9-8vqv-whqq","CGA-22gc-g5m8-g75w","CGA-23hr-x5qc-x59w","CGA-2c2m-8x9q-5qwv","CGA-2h8g-2j6v-rghm","CGA-2q4p-w4fh-x543","CGA-4qpp-hrm8-2g4g","CGA-6j63-vw4r-mgxm","CGA-7qcv-x33q-xwgw","CGA-8q82-3vc2-8gw4","CGA-r57v-86qh-7qcg","CGA-5w94-wrg9-cf6j","CGA-65f4-3785-575f","CGA-94cr-7583-x26r","CGA-9x29-85rv-8rwr","CGA-f6fm-433j-7w9m","CGA-prg2-m6h4-g626","CGA-r28g-gj5q-hp6q"],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-20T20:28:40.677Z","modified":"2026-10-20T20:28:40.677Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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