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…

在 GitHub Advisory Database 阅读

2026/10/23 01:23，GitHub Advisory Database 发布了“nbconvert: Arbitrary file write through path traversal in cell output filenames when exporting to md, latex, rst and asciidoc”（类型：漏洞公告）。严重程度为“高危”（high）。相关技术：Python、GitHub。CVE：CVE-2026-114140。