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.
| CVE | CVE-2026-115347 |
|---|---|
| Severidad | HIGH |
| CVSS | 7.5 / 10 |
| EPSS | 0.4% en 30 días (percentil 34) |
| CWE | CWE-407 |
| Exposición (Shodan) | sin hosts expuestos detectados actualmente |
Producto afectado
Mistune 3.3.0
Producto derivado de la descripción (el CPE estructurado de NVD aún no está publicado).