CVE-2026-39377

MEDIUM

6.5

Description

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. Versions 6.5 through 7.17.0 allow arbitrary file writes to locations outside the intended output directory when processing notebooks containing crafted cell attachment filenames. The `ExtractAttachmentsPreprocessor` passes 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. Version 7.17.1 contains a patch.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie4/21/2026

Derniere modification4/21/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-22CWE-73

References

https://github.com/jupyter/nbconvert/releases/tag/v7.17.1(security-advisories@github.com)

https://github.com/jupyter/nbconvert/security/advisories/GHSA-4c99-qj7h-p3vg(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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