UBUNTU-CVE-2026-40171

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...

CVE-2026-40171

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...

PT-2026-38276

Name of the Vulnerable Software and Affected Versions JupyterLab versions prior to 4.5.7 Jupyter Notebook versions prior to 7.5.6 Description The HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements. Because CommandLinker listens for all click events...

JupyterLab has an Extension Manager API/GUI Policy Discrepancy, allowing 3rd party (malicious) extensions install via POST request

The allow-list of extensions that can be installed from PyPI Extension Manager allowedextensionsuris is not correctly enforced by JupyterLab prior to 4.5.7. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This has security implications for deployments...

a-mailx (=0.1.0), a2 (>=0.1.0 <=0.3.17) +262 more potentially affected by CVE-2026-42266 via jupyterlab (>=4.0.0 <=4.5.6)

jupyterlab PYPI version =4.0.0, =0.1.0, =0.1.0b0, =0.1.0b0, =0.1.0b0, =0.1.0, =0.5.5, =2.0.0, =0.1.1, =4.33.0, =0.6.4, =0.8.0, =1.0.1, =0.1.0, =0.5.0 and more Source cves: CVE-2026-42266 Source advisory: SNYK:PYTHON-JUPYTERLAB-16425771...

Client-Side Enforcement of Server-Side Security

Overview jupyterlab is a JupyterLab computational environment. Affected versions of this package are vulnerable to Client-Side Enforcement of Server-Side Security via improper enforcement of the allowedextensionsuris. An attacker can gain unauthorized access to install unapproved extensions by...

a-mailx (=0.1.0), a2 (>=0.1.0 <=0.3.17) +262 more potentially affected by CVE-2026-42266 via jupyterlab (>=4.0.0 <=4.5.6)

jupyterlab PYPI version =4.0.0, =0.1.0, =0.1.0b0, =0.1.0b0, =0.1.0b0, =0.1.0, =0.5.5, =2.0.0, =0.1.1, =4.33.0, =0.6.4, =0.8.0, =1.0.1, =0.1.0, =0.5.0 and more Source cves: CVE-2026-42266 Source advisory: OSV:GHSA-37W4-HWHX-4RC4...

GHSA-37W4-HWHX-4RC4 JupyterLab has an Extension Manager API/GUI Policy Discrepancy, allowing 3rd party (malicious) extensions install via POST request

The allow-list of extensions that can be installed from PyPI Extension Manager allowedextensionsuris is not correctly enforced by JupyterLab prior to 4.5.7. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This has security implications for deployments...

PT-2026-37256

Name of the Vulnerable Software and Affected Versions JupyterLab versions prior to 4.5.7 Description The PyPI Extension Manager does not correctly enforce the allowed extensions uris allow-list, allowing the installation of packages not listed on the default PyPI index. This issue affects...

a-mailx (=0.1.0), a2 (>=0.1.0 <=0.3.17) +630 more potentially affected by CVE-2026-40171 via jupyterlab (>=0.31.1 <=4.5.6)

jupyterlab PYPI version =0.31.1, =0.1.0, =0.1.0b0, =0.1.0b0, =0.1.0b0, =0.1.0, =0.5.5, =2.0.0, =0.1.1, =0.1.0, =3.0.0, =4.33.0, =5.0.0 and more Source cves: CVE-2026-40171 Source advisory: OSV:GHSA-RCH3-82JR-F9W9...

a-mailx (=0.1.0), a2 (>=0.1.0 <=0.3.17) +262 more potentially affected by CVE-2026-40171 via jupyterlab (>=4.0.0 <=4.5.6)

jupyterlab PYPI version =4.0.0, =0.1.0, =0.1.0b0, =0.1.0b0, =0.1.0b0, =0.1.0, =0.5.5, =2.0.0, =0.1.1, =4.33.0, =0.6.4, =0.8.0, =1.0.1, =0.1.0, =0.5.0 and more Source cves: CVE-2026-40171 Source advisory: SNYK:PYTHON-JUPYTERLAB-16347194...

Open Redirect

Overview jupyterlab is a JupyterLab computational environment. Affected versions of this package are vulnerable to Open Redirect in the CommandLinker class. An attacker can steal authentication tokens and gain unauthorized access to user accounts by convincing a user to open a malicious notebook...

Open Redirect

Overview @jupyterlab/help-extension is a JupyterLab - Help Extension Affected versions of this package are vulnerable to Open Redirect in the CommandLinker class. An attacker can steal authentication tokens and gain unauthorized access to user accounts by convincing a user to open a malicious...

jupyter-jupyterlab-templates-0.5.3-1.1 on GA media (moderate)

jupyter-jupyterlab-templates-0.5.3-1.1 on GA media Announcement ID: openSUSE-SU-2026:10506-1 Rating: moderate Cross-References: CVE-2026-34601 CVSS scores: CVE-2026-34601 SUSE : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVE-2026-34601 SUSE : 8.7...

OPENSUSE-SU-2026:10506-1 jupyter-jupyterlab-templates-0.5.3-1.1 on GA media

These are all security issues fixed in the jupyter-jupyterlab-templates-0.5.3-1.1 package on the GA media of openSUSE Tumbleweed...

jupyter-jupyterlab-templates-0.5.2-4.1 on GA media (moderate)

jupyter-jupyterlab-templates-0.5.2-4.1 on GA media Announcement ID: openSUSE-SU-2026:10429-1 Rating: moderate Cross-References: CVE-2026-3449 CVSS scores: CVE-2026-3449 SUSE : 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVE-2026-3449 SUSE : 4.8...

jupyter-bqplot-jupyterlab-0.5.46-14.1 on GA media (moderate)

jupyter-bqplot-jupyterlab-0.5.46-14.1 on GA media Announcement ID: openSUSE-SU-2026:10424-1 Rating: moderate Cross-References: CVE-2026-25547 CVE-2026-27601 CVSS scores: CVE-2026-25547 SUSE : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-25547 SUSE : 8.7...

OPENSUSE-SU-2026:10424-1 jupyter-bqplot-jupyterlab-0.5.46-14.1 on GA media

These are all security issues fixed in the jupyter-bqplot-jupyterlab-0.5.46-14.1 package on the GA media of openSUSE Tumbleweed...

OPENSUSE-SU-2026:10429-1 jupyter-jupyterlab-templates-0.5.2-4.1 on GA media

These are all security issues fixed in the jupyter-jupyterlab-templates-0.5.2-4.1 package on the GA media of openSUSE Tumbleweed...

CVE-2024-39700

JupyterLab extension template is a copier template for JupyterLab extensions. Repositories created using this template with test option include update-integration-tests.yml workflow which has an RCE vulnerability. Extension authors hosting their code on GitHub are urged to upgrade the template to...