CVE-2026-59924
Mistune: Arbitrary File Read via Include directive path traversal
5.9
MEDIUM
CVSS 3.1
EPSS 0.34%
Description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Include.parse() joins and normalizes user-supplied include paths without verifying that the result remains within the intended markdown directory, allowing crafted include paths to access files outside that directory when markdown files are processed using md.read(). This issue is fixed in version 3.3.0.
How to fix CVE-2026-59924
To remediate CVE-2026-59924, upgrade the affected package to a fixed version below.
- —upgrade to 3.3.0 or later
Is CVE-2026-59924 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.3.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |