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

A flaw was found in jupyterlab. The PyPI Python Package Index extension manager uses a custom normalization process for package names that is weaker than the official PyPI canonicalization. This allows an authenticated user to bypass blocklist restrictions by using an alternative spelling of a...

Linux Distros Unpatched Vulnerability : CVE-2026-73416

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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....

Linux Distros Unpatched Vulnerability : CVE-2026-73626

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - JupyterLab versions =4.6.0,=4.6.1 and =4.5.9 contain an allowlist/blocklist enforcement gap in PyPIExtensionManager.install. A missing 'await' caused the...

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...

UBUNTU-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: 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

This CVE affects JupyterLab (PyPI extension manager) where the blocked_extensions_uris check uses a weaker-than-PyPI normalization, allowing an authenticated user to bypass the blocklist by using a PyPI-equivalent spelling (e.g., JupyterLab.Git for jupyterlab-git). Versions 4.5.0–4.5.10 and 4.6.2...

PT-2026-71917

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 blocked extensions...

CVE-2026-67338

A flaw was found in JupyterLab. The Extension Manager fails to validate URI protocols in package metadata URLs. This allows attackers to publish malicious PyPI packages containing javascript: URLs in their project metadata. When a user clicks on the extension name, arbitrary JavaScript code can b...

Linux Distros Unpatched Vulnerability : CVE-2026-67338

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata...

CVE-2026-67338

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

UBUNTU-CVE-2026-67338

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

EUVD-2026-51849

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

CVE-2026-67338 JupyterLab before 4.5.9 Stored XSS via Extension Manager

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

CVE-2026-67338

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

CVE-2026-67338 JupyterLab before 4.5.9 Stored XSS via Extension Manager

JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the...

CVE-2026-67338

CVE-2026-67338 affects JupyterLab prior to 4.5.9. A stored cross-site scripting vulnerability resides in the Extension Manager where URI protocols in package metadata URLs are not validated. This allows an attacker to publish malicious PyPI packages with javascript: URLs in project metadata, enab...

Incorrect Behavior Order: Validate Before Canonicalize

Overview jupyterlab is a JupyterLab computational environment. Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize when enforcing blocklists for extension installation due to insufficient normalization of package names. An attacker can bypass...