High severity7.5NVD Advisory· Published Oct 22, 2026· Updated Oct 22, 2026

CVE-2026-115355

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.

Affected products

Authlib/Mistunellm-create
Range: <3.3.0

Patches

Vulnerability mechanics

References

github.com/lepture/mistune/security/advisories/GHSA-h7ww-273w-6cm8nvd
www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-and-xss-via-include-directivenvd

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000