CVE-2026-39378

MEDIUM

6.5

Description

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. In versions 6.5 through 7.17.0, 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. nbconvert 7.17.1 contains a fix. As a workaround, do not enable `HTMLExporter.embed_images`; it is not enabled by default.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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-7jqv-fw35-gmx9(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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