CVE-2026-115349
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 22, 2026
Vendor
unknown
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.