{"id":"CVE-2026-105830","revision":"e1f1dfa7663f41d7a69fec5dd4a2e7db","records":[{"revision":"e1f1dfa7663f41d7a69fec5dd4a2e7db","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-105830","aliases":[],"title":"league/commonmark 2.0.0 before 2.10.2 Quadratic DoS via TableStartParser","description":"league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Flavored Markdown Table extension's TableStartParser::tryStart() block-start scan. Unauthenticated attackers can submit a large paragraph of pipe-free lines not starting with letters, forcing repeated full-buffer strpos scans that exhaust PHP worker CPU.","state":0,"publishedAt":"2026-10-08T14:10:31.055+00:00","modifiedAt":"2026-10-08T17:03:50.815+00:00","affected":[{"ecosystem":"Vendor product","name":"commonmark","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"thephpleague\",\n                    \"product\": \"commonmark\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.10.2\"\n                        },\n                        {\n                            \"version\": \"2.10.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/league/commonmark\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/thephpleague/commonmark/security/advisories/GHSA-3q6v-r5mr-hxv8","https://www.vulncheck.com/advisories/league-commonmark-2.0.0-before-2.10.2-quadratic-dos-via-tablestartparser"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105830","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105830","identifiers":["CVE-2026-105830"]},"retained":false,"historicalAffected":[]}],"coverage":[]}