UBUNTU-CVE-2026-59924
Mistune, a Python Markdown parser, had a vulnerability prior to version 3.3.0 where the Include.parse() function did not properly verify user-supplied include paths. This allowed crafted paths to access files outside the intended markdown directory when processing markdown files with md.read(). The issue is fixed in version 3.3.0.
AI Analysis
Technical Summary
The vulnerability in Mistune versions prior to 3.3.0 involves the Include.parse() method joining and normalizing user-supplied include paths without ensuring the resulting path remains within the designated markdown directory. This path traversal flaw can lead to unauthorized file access outside the markdown directory during markdown file processing via md.read(). The flaw is resolved in Mistune version 3.3.0.
Potential Impact
An attacker can craft include paths that bypass directory restrictions, potentially reading sensitive files outside the intended markdown directory. The vulnerability affects confidentiality but does not impact integrity or availability. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Mistune to version 3.3.0 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
UBUNTU-CVE-2026-59924
Description
Mistune, a Python Markdown parser, had a vulnerability prior to version 3.3.0 where the Include.parse() function did not properly verify user-supplied include paths. This allowed crafted paths to access files outside the intended markdown directory when processing markdown files with md.read(). The issue is fixed in version 3.3.0.
CVSS v3.1
Score 5.9medium
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]+really0.8.4-1?arch=source&distro=jammypkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Mistune versions prior to 3.3.0 involves the Include.parse() method joining and normalizing user-supplied include paths without ensuring the resulting path remains within the designated markdown directory. This path traversal flaw can lead to unauthorized file access outside the markdown directory during markdown file processing via md.read(). The flaw is resolved in Mistune version 3.3.0.
Potential Impact
An attacker can craft include paths that bypass directory restrictions, potentially reading sensitive files outside the intended markdown directory. The vulnerability affects confidentiality but does not impact integrity or availability. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Mistune to version 3.3.0 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-59924
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a58b44f68715ace43d6b701
Added to database: 07/16/2026, 10:37:03 UTC
Last enriched: 07/16/2026, 11:30:47 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 5
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