CVE-2026-115355
Mistune before 3.3.0 Path Traversal and XSS via Include Directive
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | lepture |
| Product | mistune |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
lepture / mistune
0 < 3.3.0
References
Credits
🔍 sergeykochanov