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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-73416 Detail

Description

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_uris by comparing requested install names to blocklist entries with custom normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as JupyterLab.Git for a blocklisted package such as jupyterlab-git, and JupyterLab accepts the install request even though pip resolves the variant to the same package. Security impact requires an allowlist or blocklist intended to restrict package installation, the PyPI Extension Manager, and kernels and terminals that are disabled or delegated to remote hosts. The bypass lets an authenticated user install a prohibited extension, defeat integrity restrictions, and affect availability without gaining new read access. This issue is fixed in versions 4.5.10 and 4.6.2.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-B 6.1 MEDIUM
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/pull/19184 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/pull/19185 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/pull/19186 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1 GitHub, Inc.
https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-89vp-jrxv-24w8 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-178 Improper Handling of Case Sensitivity GitHub, Inc.  
CWE-180 Incorrect Behavior Order: Validate Before Canonicalize GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-73416
NVD Published Date:
08/13/2026
NVD Last Modified:
08/13/2026
Source:
GitHub, Inc.