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NVD Vulnerability Details :
CVE-2026-39378
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-21 Apr, 2026 | 01:16
Updated At-23 Apr, 2026 | 17:50

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CPE Matches
jupyter
jupyter
>>nbconvert>>Versions from 6.5.0(inclusive) to 7.17.1(exclusive)
cpe:2.3:a:jupyter:nbconvert:*:*:*:*:*:python:*:*
Weaknesses
CWE IDTypeSource
CWE-22Primarysecurity-advisories@github.com
CWE-73Primarysecurity-advisories@github.com
CWE ID: CWE-22
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-73
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/jupyter/nbconvert/releases/tag/v7.17.1security-advisories@github.com
Product
https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9security-advisories@github.com
Mitigation
Vendor Advisory
Hyperlink: https://github.com/jupyter/nbconvert/releases/tag/v7.17.1
Source: security-advisories@github.com
Resource:
Product
Hyperlink: https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Change History
0Changes found
Details not found