---
id: CVE-2026-102904
title: >-
  JupyterLab is an extensible environment for interactive and reproducible
  computing, based on the Jupyter Notebook Architecture
summary: >-
  JupyterLab is an extensible environment for interactive and reproducible
  computing, based on the Jupyter Notebook Architecture. From JupyterLab 4.0.0
  until 4.5.11 and 4.6.4, the PyPI Extension Manager uninstall request reaches
  ExtensionH…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-88
  - CWE-209
  - CWE-918
vendor: jupyterlab
product: jupyterlab
affected:
  - 'jupyterlab >= 4.0.0, < 4.5.11'
  - 'jupyterlab >= 4.6.0, < 4.6.4'
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T21:40:15.583'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102904'
references:
  - url: >-
      https://github.com/jupyterlab/jupyterlab/commit/a274a8276b9185d03efd4c3c20713d3137ac49e6
    label: security-advisories@github.com
  - url: >-
      https://github.com/jupyterlab/jupyterlab/commit/e277bc958e737130ac47b6c5078d08b29298828f
    label: security-advisories@github.com
  - url: 'https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.11'
    label: security-advisories@github.com
  - url: 'https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-3325-v43h-43rv
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T21:49:08.215Z'
---

## Overview

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 4.0.0 until 4.5.11 and 4.6.4, the PyPI Extension Manager uninstall request reaches ExtensionHandler.post, which validates extension names for installation but passes uninstall names to PyPIExtensionManager.uninstall and python -m pip uninstall without rejecting option-like values. The security impact requires that the PyPI Extension Manager is enabled, the account can call the extension API, and kernels and terminals are disabled or delegated to remote hosts; otherwise the user can already read files and make outbound requests directly. An authenticated user with extension API access can supply a pip requirements option to make the server read a local file or fetch an internal URL, and reflected parse errors can return the first unparsable line or response content. A pip log option can also create or corrupt a chosen path with pip-generated log text, but the requester cannot select an arbitrary disclosed line or arbitrary file content, and the injection does not add code execution or availability impact beyond ordinary package removal. This issue is fixed in JupyterLab 4.5.11 and 4.6.4.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.