CVE-2026-115354
Mistune before 3.3.0 Arbitrary Local File Read via Include Directive
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 22, 2026
Description
Mistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to read local files by supplying relative or absolute include paths. Attackers who submit Markdown rendered via Markdown.read() can disclose files such as /etc/passwd and inject unescaped HTML or script content into rendered output.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
mistunelepture |
|
References
- GitHub Security Advisory (GHSA-jhcm-5rpf-j3wv)vendor-advisory
- VulnCheck Advisory: Mistune before 3.3.0 Arbitrary Local File Read via Include Directivethird-party-advisory
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