{"schema":"threatline.record/2","record":{"id":"CVE-2026-115349","aliases":["GHSA-3q64-rw38-243v"],"summary":"Mistune 3.0.0 before 3.3.0 Denial of Service via Nested Bracket Parsing","details":"Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity denial of service vulnerability in the parse_link_text function in src/mistune/helpers.py. Attackers can submit markdown with deeply nested square brackets triggering quadratic parsing time, exhausting server CPU with small crafted requests.","categories":["Unclassified"],"product":"mistune","vendor":"lepture","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115349","source_modified_at":"2026-10-22T19:13:26.171Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"mistune","vendor":"lepture","versions":[{"version":"3.0.0","status":"affected","versionType":"semver","lessThan":"3.3.0"},{"version":"3.3.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115349","source_modified_at":"2026-10-22T19:13:26.171Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"mistune","ecosystem":null},"version":"3.3.0","basis":"first unaffected version stated in the CVE record"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00343,"percentile":0.26666,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:13:26.171Z","modified_at":"2026-10-22T19:13:26.171Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115349","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:13:26.171Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115349","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/lepture/mistune/security/advisories/GHSA-3q64-rw38-243v","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/mistune-3.0.0-before-3.3.0-denial-of-service-via-nested-bracket-parsing","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-22T19:13:26.171Z","content_hash":"c1f5edb3a38c6e5c9c55322ef6344457f02ea3135571e10b7a386e633bfc9a87"}}