CVE-2026-59927
MEDIUM
MEDIUM
Priority: 0.03
BB Relevance:
71/100
Published: 2026-07-08
Modified: 2026-10-25
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
Low
Description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct self-includes and not indirect cycles, allowing two markdown files that include each other to trigger unbounded recursion, raise RecursionError, and crash the rendering request. This issue is fixed in version 3.3.0.
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| mistune_project | mistune | < 3.3.0 |
References & Advisories (3)
Release Notes
Patch
Exploit
Third Party Advisory