nbconvert: Arbitrary file write through path traversal in cell output filenames when exporting to md, latex, rst and asciidoc

影響: pip:nbconvert >= 5.4.0, <= 7.17.1 → 7.17.2

nbconvert <= v7.17.1 has an arbitrary file write vulnerability due to a path traversal in ipynb cell output metadata, more specifically on the filename attribute. Vulnerable converters : --to markdown, --to latex, --to rst, --to asciidoc. In ExtractOutputPreprocessor, extractoutput.py:116-119 joins attacker-controlled path to output_files_dir with no canonicalization check, enabling arbitrary file write. This is a sibling vulnerability of https://github.com/advisories/GHSA-4c99-qj7h-p3vg. Impac…

GitHub Advisory Databaseで読む

2026/10/23 01:23、GitHub Advisory Databaseが「nbconvert: Arbitrary file write through path traversal in cell output filenames when exporting to md, latex, rst and asciidoc」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、GitHub。CVE: CVE-2026-114140。