CVE-2026-115349 — Mistune 3.0.0 before 3.3.0 Denial of Service via Nested Bracket Parsing
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 submi…
Published: 2026-10-22 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7