UBUNTU-CVE-2026-39377

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Source
https://ubuntu.com/security/CVE-2026-39377
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-39377
Upstream
  • CVE-2026-39377
Published
2026-04-21T01:16:00Z
Modified
2026-05-20T16:25:37.905404973Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. Versions 6.5 through 7.17.0 allow arbitrary file writes to locations outside the intended output directory when processing notebooks containing crafted cell attachment filenames. The ExtractAttachmentsPreprocessor passes attachment filenames directly to the filesystem without sanitization, enabling path traversal attacks. This vulnerability provides complete control over both the destination path and file extension. Version 7.17.1 contains a patch.

References

Affected packages

Ubuntu:18.04:LTS
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.2.0-4
5.*
5.3.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.3.1-1",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "5.3.1-1",
            "binary_name": "python-nbconvert"
        },
        {
            "binary_version": "5.3.1-1",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"
Ubuntu:20.04:LTS
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.4-2ubuntu2
5.6.0-1
5.6.0-2
5.6.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.6.1-1",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "5.6.1-1",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"
Ubuntu:22.04:LTS
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.6.1-3
6.*
6.1.0-1
6.3.0-1
6.4.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.4.0-1",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "6.4.0-1",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"
Ubuntu:24.04:LTS
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.5.3-4
6.5.3-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.5.3-5",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "6.5.3-5",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"
Ubuntu:25.10
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.16.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.16.6-1",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "7.16.6-1",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"
Ubuntu:26.04:LTS
nbconvert

Package

Name
nbconvert
Purl
pkg:deb/ubuntu/nbconvert?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.16.6-1
7.17.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.17.0-1",
            "binary_name": "jupyter-nbconvert"
        },
        {
            "binary_version": "7.17.0-1",
            "binary_name": "python3-nbconvert"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39377.json"