{"id":"CVE-2026-115349","published":"2026-10-22T19:17:40.597","lastModified":"2026-10-26T20:17:50.423","description":"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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-1333"],"vendors":[],"products":[],"references":[{"url":"https://github.com/lepture/mistune/security/advisories/GHSA-3q64-rw38-243v","tags":[]},{"url":"https://www.vulncheck.com/advisories/mistune-3.0.0-before-3.3.0-denial-of-service-via-nested-bracket-parsing","tags":[]}],"exploitRefs":[{"url":"https://github.com/lepture/mistune/security/advisories/GHSA-3q64-rw38-243v","tags":[]}],"hasPoc":true,"ai":null}