UBUNTU-CVE-2026-40171

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Source
https://ubuntu.com/security/CVE-2026-40171
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-40171
Upstream
  • CVE-2026-40171
Published
2026-05-06T20:16:00Z
Modified
2026-05-20T16:25:38.781312910Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with attacker-controlled notebook content to steal authentication tokens with a single click. An attacker can craft a malicious notebook file containing elements that appear indistinguishable from legitimate controls and trigger execution when a user interacts with them. Successful exploitation allows theft of the user's authentication token and complete takeover of the Jupyter session through the REST API, including reading files, creating or modifying files, accessing kernels to execute arbitrary code, and creating terminals for shell access. This issue has been fixed in Notebook 7.5.6, JupyterLab 4.5.7, @jupyter-notebook/help-extension 7.5.6, and @jupyterlab/help-extension 4.5.7. As a workaround, disable the affected help extensions or set allowCommandLinker to false in the sanitizer configuration.

References

Affected packages

Ubuntu:18.04:LTS
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=bionic

Affected ranges

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

Affected versions

4.*
4.2.3-4
5.*
5.1.0-2
5.2.1-2
5.2.2-1
5.2.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "5.2.2-1ubuntu0.1"
        },
        {
            "binary_name": "python-notebook",
            "binary_version": "5.2.2-1ubuntu0.1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "5.2.2-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"
Ubuntu:20.04:LTS
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=focal

Affected ranges

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

Affected versions

5.*
5.7.8-1
6.*
6.0.0-1
6.0.0-2
6.0.2-1
6.0.3-1
6.0.3-2
6.0.3-2ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "6.0.3-2ubuntu0.1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "6.0.3-2ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"
Ubuntu:25.10
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=questing

Affected ranges

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

Affected versions

6.*
6.4.13-5
6.4.13-5ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "6.4.13-5ubuntu0.1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "6.4.13-5ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"
Ubuntu:26.04:LTS
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=resolute

Affected ranges

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

Affected versions

6.*
6.4.13-5ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "6.4.13-5ubuntu0.1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "6.4.13-5ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"
Ubuntu:Pro:22.04:LTS
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

6.*
6.2.0-1
6.4.5-2
6.4.5-3
6.4.5-4
6.4.8-1
6.4.8-1ubuntu0.1
6.4.8-1ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "6.4.8-1ubuntu0.1+esm1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "6.4.8-1ubuntu0.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"
Ubuntu:Pro:24.04:LTS
jupyter-notebook

Package

Name
jupyter-notebook
Purl
pkg:deb/ubuntu/jupyter-notebook?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

6.*
6.4.12-2.2
6.4.12-2.2ubuntu1
6.4.12-2.2ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jupyter-notebook",
            "binary_version": "6.4.12-2.2ubuntu1+esm1"
        },
        {
            "binary_name": "python3-notebook",
            "binary_version": "6.4.12-2.2ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40171.json"