[GHSA] GHSA-6m44-fpc8-c3rq (high) — Mistune: Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown

GHSA-6m44-fpc8-c3rq Severity: high CVE: CVE-2026-76098

Mistune: Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown

## Summary Mistune v3.3.2 is vulnerable to a Denial of Service (DoS) attack via uncontrolled recursion in the HTML rendering of deeply-nested emphasis tokens. By submitting Markdown containing approximately 1,000 consecutive asterisk characters, an attacke