CVE-2026-115355

EUVD-2026-108425
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 31.65%
Debian logo
Debian Releases
Debian Product
Codename
mistune
bookworm
vulnerable
forky
vulnerable
sid
3.4.0-1
fixed
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/lepture/mistune/security/advisories/GHSA-h7ww-273w-6cm8
https://www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-and-xss-via-include-directive