7.5
High
CVE-2026-76098 Mistune is a Python Markdown parser with renderers and plugins
Description
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
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| mistune 3.3 | 3.3.0 → < 3.3.3 | 3.3.3 |
References
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of mistune
The 28 CVEs of mistune →
CVE-2026-121437
Mistune from 3.3.0 before 3.3.4 contains a denial of service vulnerability that allows remote attackers to exhaust CPU…
8.7
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CVE-2026-121438
Mistune before 3.3.3 contains a denial of service vulnerability in InlineParser.parse_link that allows attackers to…
6.9
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CVE-2026-115354
Mistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to…
7.1
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CVE-2026-115355
Mistune before 3.3.0 contains a path traversal vulnerability in the Include directive that allows attackers to read…
8.7
High