{"id":"CVE-2026-115347","aliases":[],"cve":{"records":[{"id":"CVE-2026-115347","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-22T11:20:02.626Z","published":"2026-10-22T19:13:24.689Z","modified":"2026-10-26T19:38:30.510Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-22T19:13:24.689Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-26T19:38:30.510Z"}],"references":[{"url":"https://github.com/lepture/mistune/security/advisories/GHSA-f32h-38gf-rg5r","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-denial-of-service-via-parse-link-text","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-407","description":"Inefficient Algorithmic Complexity","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*","versionEndExcluding":"3.3.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-26T19:26:48.811448Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Mistune before 3.3.0 Quadratic Denial of Service via parse_link_text","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"Mistune before 3.3.0 contains an inefficient algorithmic complexity vulnerability in parse_link_text that allows remote attackers to cause denial of service through unbalanced square brackets. Attackers can submit markdown containing long runs of unmatched brackets to mistune.html(), triggering repeated forward scans that stall worker processes for minutes.","score":8.7,"severity":"high","published":"2026-10-22T19:13:24.689Z","modified":"2026-10-26T19:38:30.510Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"lepture","name":"mistune","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.3.0","versionType":"semver"},{"version":"3.3.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/mistune","packageIdentity":{"ecosystem":"PyPI","name":"mistune"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-115347"}],"remediation":[],"references":["https://github.com/lepture/mistune/security/advisories/GHSA-f32h-38gf-rg5r","https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-denial-of-service-via-parse-link-text"],"sources":[{"name":"CVE","id":"CVE-2026-115347","modified":"2026-10-26T19:38:30.510Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-115347"}],"assessments":[{"source":"VulnCheck","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},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"sourceAffected":[],"observedAt":"2026-10-29T14:34:20.787Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:10:32.801Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Mistune before 3.3.0 has a denial of service vulnerability via parse_link_text, allowing attackers to cause a denial of service with unbalanced square brackets. Attackers can submit markdown with long runs of unmatched brackets to trigger repeated scans.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:49:28.181Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-115347"}]}}