CVE-2026-59924
Mistune: Arbitrary File Read via Include directive path traversal
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.
INFO
Published Date :
July 8, 2026, 5:17 p.m.
Last Modified :
July 9, 2026, 7:34 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Mistune to version 3.3.0.
- Verify file access controls.
Public PoC/Exploit Available at Github
CVE-2026-59924 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59924.
| URL | Resource |
|---|---|
| https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993 | Patch |
| https://github.com/lepture/mistune/releases/tag/v3.3.0 | Release Notes |
| https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf | Exploit Vendor Advisory |
| https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59924 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59924
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59924 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59924 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:* versions up to (excluding) 3.3.0 Added Reference Type GitHub, Inc.: https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/lepture/mistune/releases/tag/v3.3.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 08, 2026
Action Type Old Value New Value Added Reference https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf Added SSVC {'id': 'CVE-2026-59924', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-08T17:10:16.347280Z'} -
New CVE Received by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'lepture', 'product': 'mistune', 'versions': [{'status': 'affected', 'version': '< 3.3.0'}]}] Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-22 Added Reference https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993 Added Reference https://github.com/lepture/mistune/releases/tag/v3.3.0 Added Reference https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf