{"schema":"threatline.record/2","record":{"id":"CVE-2026-115352","aliases":["GHSA-xrpv-r66x-8p7j"],"summary":"Mistune before 3.3.0 Quadratic-Time DoS via Unmatched Brackets in Inline Parser","details":"Mistune before 3.3.0 contains an algorithmic complexity vulnerability in the inline link parser that allows unauthenticated attackers to exhaust CPU by submitting long runs of unmatched '[' characters. Attackers can send small markdown payloads that trigger O(N^2) parse_link_text and parse_link_label probing, occupying rendering workers for 30+ seconds per 16 KB input.","categories":["Unclassified"],"product":"mistune","vendor":"lepture","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115352","source_modified_at":"2026-10-23T21:07:23.519Z","fetched_at":"2026-10-23T21:10:45.942435Z","product":"mistune","vendor":"lepture","versions":[{"version":"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-2026-115352","source_modified_at":"2026-10-23T21:07:23.519Z","fetched_at":"2026-10-23T21:10:45.942435Z","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":0.00359,"percentile":0.28448,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:13:28.427Z","modified_at":"2026-10-23T21:07:23.519Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115352","fetched_at":"2026-10-23T21:10:45.942435Z","source_modified_at":"2026-10-23T21:07:23.519Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115352","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-xrpv-r66x-8p7j","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-time-dos-via-unmatched-brackets-in-inline-parser","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-23T17:33:02.968794Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T21:07:23.519Z","content_hash":"7db40033a257eb29a860e8d460741fc6a60e635ece5fe414d4afa18a3a7e202a"}}