{"id":"CVE-2026-115348","revision":"9b3d79fd33814b0aa3e9543aa98d5f46","records":[{"revision":"9b3d79fd33814b0aa3e9543aa98d5f46","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-115348","aliases":[],"title":"Mistune before 3.3.0 Quadratic-Time DoS via parse_link_text","description":"Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity vulnerability in the inline link parser's parse_link_text function that allows unauthenticated attackers to exhaust CPU with unbalanced brackets. Attackers can submit Markdown containing many unbalanced '[' or '![' characters, forcing repeated unbounded forward scans and tying up worker processes for minutes.","state":0,"publishedAt":"2026-10-22T19:13:25.416+00:00","modifiedAt":"2026-10-22T19:13:25.416+00:00","affected":[{"ecosystem":"Vendor product","name":"mistune","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"lepture\",\n                    \"product\": \"mistune\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/mistune\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.3.0\"\n                        },\n                        {\n                            \"version\": \"3.3.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\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/lepture/mistune/security/advisories/GHSA-x2gr-6qf2-fc9x","https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-time-dos-via-parse-link-text"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115348","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115348","identifiers":["CVE-2026-115348"]},"retained":false,"historicalAffected":[]}],"coverage":[]}