Mistune: Path Traversal and XSS in Include directive

影響: pip:mistune <= 3.2.0 → 3.3.0

The Include directive in src/mistune/directives/include.py does not validate that the resolved file path stays within the source directory, allowing path traversal via ../ sequences to read arbitrary files. Additionally, error messages and included file contents are rendered without HTML escaping, leading to XSS even when escape=True. Affected functions: - Path resolution (lines 27-31) - block_error() in html.py (line 140) - render_html_include() (line 72) The Include plugin must be explicitly…

GitHub Advisory Databaseで読む

2026/10/24 05:46、GitHub Advisory Databaseが「Mistune: Path Traversal and XSS in Include directive」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「重要」(high) です。関連する技術: Python。CVE: CVE-2026-115355。