{"schemaVersion":3,"id":"UBUNTU-CVE-2023-37463","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Markdown syntax with a spec. Three polynomial time complexity issues in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. These vulnerabilities have been patched in 0.29.0.gfm.12.","dates":{"published":"2023-07-13T20:15:00.000Z","modified":"2026-02-04T02:44:00.124Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":true,"selection":"version-preference"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","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":10,"impact":6,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"cmark-gfm","name":"cmark-gfm","label":"cmark-gfm","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/cmark-gfm","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/CVE-2023-37463","label":"ubuntu.com/security/CVE-2023-37463","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://github.com/github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5","label":"github.com/github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5","hostname":"github.com","tags":["REPORT"]},{"url":"https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.12","label":"github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.12","hostname":"github.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-37463","label":"www.cve.org/CVERecord?id=CVE-2023-37463","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2023-37463"]},"timeline":[{"kind":"published","date":"2023-07-13T20:15:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T02:44:00.124Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T18:56:34.666Z","stale":false,"partial":false}}