chore(deps): update dependency nbconvert to v7.17.1 [security] - #17
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This PR contains the following updates:
==7.9.2→==7.17.1nbconvert has an uncontrolled search path that leads to unauthorized code execution on Windows
CVE-2025-53000 / GHSA-xm59-rqc7-hhvf
More information
Details
Summary
On Windows, converting a notebook containing SVG output to a PDF results in unauthorized code execution. Specifically, a third party can create a
inkscape.batfile that defines a Windows batch script, capable of arbitrary code execution.When a user runs
jupyter nbconvert --to pdfon a notebook containing SVG output to a PDF on a Windows platform from this directory, theinkscape.batfile is run unexpectedly.Details
Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer.
nbconvertsearches for aninkscapeexecutable when converting notebooks to PDFs here: https://github.com/jupyter/nbconvert/blob/4f61702f5c7524d8a3c4ac0d5fc33a6ac2fa36a7/nbconvert/preprocessors/svg2pdf.py#L104The MITRE page on CWE-427 (Uncontrolled Search Path Element) summarizes the root cause succinctly:
PoC
Complete instructions, including specific configuration details, to reproduce the vulnerability.
Create a directory containing:
A hidden bat file called
inkscape.batcontainingmsg * "You've been hacked!"A dummy ipynb file called
Machine_Learning.ipynbRun the command
jupyter nbconvert --to pdf Machine_Learning.ipynb.Wait a few seconds, and you should see a popup showing the message "You've been hacked!"
Impact
All Windows users.
Severity
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding
CVE-2026-39378 / GHSA-7jqv-fw35-gmx9
More information
Details
Summary
When
HTMLExporter.embed_images=True, nbconvert's markdown renderer allows arbitrary file read via path traversal in image references. A malicious notebook can exfiltrate sensitive files from the conversion host by embedding them as base64 data URIs in the output HTML.Patches
Upgrade to nbconvert 7.17.1
Workarounds
Do not enable
HTMLExporter.embed_images(it is not enabled by default).Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
nbconvert has an Arbitrary File Write via Path Traversal in Cell Attachment Filenames
CVE-2026-39377 / GHSA-4c99-qj7h-p3vg
More information
Details
Arbitrary File Write via Path Traversal in Cell Attachment Filenames
Summary
nbconvert allows arbitrary file writes to locations outside the intended output directory when processing notebooks containing crafted cell attachment filenames. The
ExtractAttachmentsPreprocessorpasses attachment filenames directly to the filesystem without sanitization, enabling path traversal attacks. This vulnerability provides complete control over both the destination path and file extension.Impact
This vulnerability allows writing files with arbitrary content to arbitrary filesystem locations, limited only by the permissions of the process running nbconvert. The attacker controls:
../traversal)Patches
Workarounds
disable ExtractAttachmentsPreprocessor by setting:
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
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