CVE-2026-39378

medium Red Hat
CVSS v3 Base Score
5.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 88% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Published: April 21, 2026 (80 days ago)
Last Modified: April 21, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in nbconvert, a tool used to convert Jupyter notebooks. A malicious notebook can exploit this vulnerability when the `HTMLExporter.embed_images` setting is enabled. This allows for path traversal in image references, which can lead to arbitrary file read. Consequently, sensitive files from the conversion host could be exposed by embedding them as base64 data in the output HTML.

CWE

CWE-22

Affected Products

Migration Toolkit for Applications 8Red Hat OpenShift AI (RHOAI)Red Hat Satellite 6

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com