CVE-2026-115355
Mistune before 3.3.0 Path Traversal and XSS via Include Directive
- State
- Published
- Severity
- 8.7 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 Include directive that allows attackers to read arbitrary files by supplying ../ sequences in include paths. Attackers can also inject HTML through unescaped error messages and included file contents to perform cross-site scripting even when escape=True is set.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-h7ww-273w-6cm8)vendor-advisory
- VulnCheck Advisory: Mistune before 3.3.0 Path Traversal and XSS via Include Directivethird-party-advisory
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