JupyterLab: PyPI extension blocklist package-name canonicalization bypass

JupyterLab's PyPI extension manager enforces blockedextensionsuris by comparing the requested install name to blocklist entries with a custom string normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as...

BIT-JUPYTERLAB-2026-73416 jupyterlab: PyPI extension blocklist package-name canonicalization bypass

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

CVE-2026-73416

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

CVE-2026-73416

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

CVE-2026-73416 jupyterlab: PyPI extension blocklist package-name canonicalization bypass

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

CVE-2026-73416

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

CVE-2026-73416 jupyterlab: PyPI extension blocklist package-name canonicalization bypass

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

EUVD-2026-58521

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

SUSE CVE-2026-73416

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces...

Not Failing Securely ('Failing Open')

Overview jupyterlab is a JupyterLab computational environment. Affected versions of this package are vulnerable to Not Failing Securely 'Failing Open' in the install function of PyPIExtensionManager when the allowlist/blocklist check is not properly enforced due to a missing await. An attacker ca...

PT-2026-71454

Name of the Vulnerable Software and Affected Versions JupyterLab versions 4.6.0 through 4.6.1 JupyterLab versions 4.5.0 through 4.5.9 Description An enforcement gap exists in the PyPIExtensionManager.install function due to a missing await keyword, which prevents the is install allowed coroutine...

PT-2026-71917

Name of the Vulnerable Software and Affected Versions jupyterlab versions 4.5.0 through 4.5.9 jupyterlab versions 4.6.0 through 4.6.1 Description The PyPI extension manager in JupyterLab fails to properly enforce blocked extensions uris because it uses a custom normalization process that is weake...

UBUNTU-CVE-2026-42266

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.0.0 to 4.5.6, the allow-list of extensions that can be installed from PyPI Extension Manager allowedextensionsuris is not correctly enforced by JupyterLab. The Py...