HIGH 7.5 NVD
CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.render_token() can exceed Python's recursion limit and raise RecursionError, allowing crafted Markdown to crash a parsing process. This issue is fixed in version 3.3.3
References
- https://github.com/lepture/mistune/commit/0938fb7
- https://github.com/lepture/mistune/security/advisories/GHSA-6m44-fpc8-c3rq
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-24 via NVD.
vulnfeed aggregates 11313 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.