Mistune: Path Traversal and XSS in Include directive
High-risk advisory
CVE-2026-115355
Summary
Mistune: Path Traversal and XSS in Include directive
Why it matters
GitHub has published a reviewed security advisory for mistune. Prioritize it with other application dependency updates, especially because EPSS places it in the 40% percentile.
Operator check
Check whether mistune is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.5%; percentile: 40%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.