CVE catalog
CVE-2026-39378
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 markd
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.31% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nbconvert | sid | 7.17.1-2 | fixed |
| Debian | nbconvert | forky | 7.17.1-2 | fixed |
| Debian | nbconvert | trixie | 7.16.6-1+deb13u1 | fixed |
| Debian | nbconvert | bookworm | 6.5.3-3 | vulnerable |
| Cpe | nbconvert | Not reported | Not reported | vulnerable |
| Cpe | nbconvert | Not reported | 7.17.1 | fixed |
| PyPI | nbconvert | Not reported | 7.17.1 | fixed |
| PyPI | nbconvert | Not reported | 7.17.1 | fixed |
| Cpe | nbconvert | Not reported | 7.17.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nbconvert | source | sid | 7.17.1-1 | not yet assigned | Not reported | [1134890] |
| Debian | nbconvert | source | forky | 7.17.1-1 | not yet assigned | Not reported | [1134890] |
| Debian | nbconvert | source | trixie | 7.16.6-1+deb13u1 | not yet assigned | Not reported | [1134890] |
| Debian | nbconvert | source | bookworm | (unfixed) | not yet assigned | Not reported | [1134890] |
| Cpe | nbconvert | cpe | Not reported | 7.17.1 | Not reported | Not reported | Not reported |
| PyPI | nbconvert | PyPI | Not reported | 7.17.1 | Not reported | GHSA-7JQV-FW35-GMX9 | Not reported |
| PyPI | nbconvert | PyPI | Not reported | 7.17.1 | Not reported | PYSEC-2026-2230 | Not reported |
| Cpe | nbconvert | cpe | Not reported | 7.17.1 | Not reported | NVD-CVE-2026-39378 | Not reported |
Notes
[bookworm] nbconvert: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [jupyter-nbconvert]Affected
Source package: [nbconvert]
Details (2)
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
- [python3-nbconvert]Affected
Source package: [nbconvert]
Details (2)
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
- [python-nbconvert-doc]Affected
Source package: [nbconvert]
Details (2)
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
6.5.3-3· all · bookwormAffected
nvd · nbconvert · debian · bookworm; nvd · nbconvert · debian · 12
[Debian 13 (Trixie)]
- [jupyter-nbconvert]Fixed
Source package: [nbconvert]
Details (2)
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
- [python3-nbconvert]Fixed
Source package: [nbconvert]
Details (2)
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
- [python-nbconvert-doc]Fixed
Source package: [nbconvert]
Details (2)
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
7.16.6-1+deb13u1· all · trixieFixed · Fixed:
7.16.6-1+deb13u1nvd · nbconvert · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10603-1.json]
- [https://github.com/jupyter/nbconvert/releases/tag/v7.17.1]
- [https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-39378]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-39378]
- [https://osv.dev/vulnerability/GHSA-7jqv-fw35-gmx9]
- [https://security-tracker.debian.org/tracker/CVE-2026-39378]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39378.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]