CVE-2026-115353 Mistune before 3.3.0 Path Traversal via include Directive
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-115353?
CVE-2026-115353 is a critical vulnerability in lepture mistune, published on 22 Oct 2026.
Official description
Mistune before 3.3.0 contains a path traversal vulnerability in the RST include directive that allows attackers to read arbitrary files by supplying relative or absolute paths. Attackers can submit markdown containing include directives referencing ../ sequences or absolute paths to embed sensitive files like credentials or environment data in rendered HTML.
Weakness: CWE-22
Which versions are affected by CVE-2026-115353?
How do I fix CVE-2026-115353?
No fix has been published for CVE-2026-115353 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-115353 being exploited?
There is no known exploitation of CVE-2026-115353 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-115353, GHSA-9jjx-3hq3-hx4j, GHSA-pfvv-4pq6-mx74, UBUNTU-CVE-2026-115353.