CVE-2026-111758

{"id": "CVE-2026-111758", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-111758", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-28T16:39:57.942731Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "markdown-it", "product": "markdown-it", "versions": [{"status": "affected", "version": ">= 14.1.0, < 14.3.3"}, {"status": "affected", "version": ">= 15.0.0, < 15.0.3"}]}]}], "published": "2026-10-20T21:17:17.110", "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"}, {"url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-gfr2-rv44-r23c", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "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(n\u00b2) 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."}], "lastModified": "2026-10-28T17:17:39.977", "sourceIdentifier": "security-advisories@github.com"}