DEBIAN-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 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.
DEBIAN-CVE-2026-39378
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-39378
nbconvert
Source reference: /affected/0/package/name
- Affected versions
- 6.5.3-3
Source reference:
/affected/0/versions6.5.3-4Source reference:
/affected/0/versions6.5.3-5Source reference:
/affected/0/versions7.16.4-1Source reference:
/affected/0/versions7.16.4-2Source reference:
/affected/0/versions7.16.5-1Source reference:
/affected/0/versions7.16.6-1Source reference:
/affected/0/versions7.17.0-1Source reference:
/affected/0/versions7.17.1-1Source reference:
/affected/0/versions7.17.1-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
nbconvert
Source reference: /affected/1/package/name
- Affected versions
- 7.16.6-1
Source reference:
/affected/1/versions - Fixed versions
- 7.16.6-1+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
nbconvert
Source reference: /affected/2/package/name
- Affected versions
- 7.16.6-1
Source reference:
/affected/2/versions7.17.0-1Source reference:
/affected/2/versions - Fixed versions
- 7.17.1-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nbconvert",
"purl": "pkg:deb/debian/nbconvert?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"6.5.3-3",
"6.5.3-4",
"6.5.3-5",
"7.16.4-1",
"7.16.4-2",
"7.16.5-1",
"7.16.6-1",
"7.17.0-1",
"7.17.1-1",
"7.17.1-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39378.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.16.6-1+deb13u1"
}
]
}
],
"package": {
"name": "nbconvert",
"purl": "pkg:deb/debian/nbconvert?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.16.6-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39378.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.17.1-1"
}
]
}
],
"package": {
"name": "nbconvert",
"purl": "pkg:deb/debian/nbconvert?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.16.6-1",
"7.17.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39378.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56907 · Revision 1
- Added to Heist Feed
- Publisher date