5.3

CVE-2026-59927

Exploit

Mistune directives/include: mutual `.. include::` recursion crashes the renderer with `RecursionError`, denial of service via two attacker-controlled markdown files

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mistune Project ≫ Mistune Version < 3.3.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.31% 0.226
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-674 Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

CWE-755 Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

https://github.com/lepture/mistune/releases/tag/v3.3.0
Release Notes
https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993
Patch
https://github.com/lepture/mistune/security/advisories/GHSA-8mpj-m6qm-5qr8
Third Party Advisory
Exploit