CVE-2026-115347
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 22, 2026
Vendor
unknown
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.