CVE-2026-115355

NameCVE-2026-115355
DescriptionMistune 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mistune (PTS)bookworm2.0.4-1vulnerable
trixie3.1.3-1vulnerable
forky3.1.4-1vulnerable
sid3.4.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mistunesource(unstable)3.3.4-1

Notes

https://github.com/lepture/mistune/security/advisories/GHSA-h7ww-273w-6cm8

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