What is GHSA-7jqv-fw35-gmx9?

GHSA-7jqv-fw35-gmx9 is a security advisory published by GitHub Security Advisories with Medium severity. nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding

Which CVE IDs does GHSA-7jqv-fw35-gmx9 cover?

GHSA-7jqv-fw35-gmx9 covers the following CVE IDs: CVE-2026-39378. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-7jqv-fw35-gmx9?

GHSA-7jqv-fw35-gmx9 has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

Which products are affected by GHSA-7jqv-fw35-gmx9?

GHSA-7jqv-fw35-gmx9 affects 1 product, including: pip/nbconvert:\u003e= 6.5.0, \u003c 7.17.1.

GHSA-7jqv-fw35-gmx9MediumCVSS 6.5

nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding

Vendor

GitHub Security Advisories

Published

April 21, 2026

Last Modified

April 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-39378 →

📋 Description

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).

🎯 Affected products1

pip/nbconvert:>= 6.5.0, < 7.17.1

🔗 References (4)

https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9
https://nvd.nist.gov/vuln/detail/CVE-2026-39378
https://github.com/jupyter/nbconvert/releases/tag/v7.17.1
https://github.com/advisories/GHSA-7jqv-fw35-gmx9