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CVE-2026-102904— JupyterLab: Argument injection in JupyterLab extension uninstall exposes server-readable files and internal URLs

Quick assessment

Affected
jupyterlab jupyterlab
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 vali

CVSS 5.4 · Medium
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I. Basic Information for CVE-2026-102904

Vulnerability Information

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Vulnerability Title
JupyterLab: Argument injection in JupyterLab extension uninstall exposes server-readable files and internal URLs
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyterlab jupyterlab >= 4.0.0, < 4.5.11 -

II. Public POCs for CVE-2026-102904

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III. Intelligence Information for CVE-2026-102904

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Vendor Pages for CVE-2026-102904 (2)

Other References for CVE-2026-102904 (3)

Same Patch Batch · jupyterlab · 2026-09-29 · 3 CVEs total

CVE-2026-102831 8.1 HIGH JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the sy
CVE-2026-102830 6.8 MEDIUM JupyterLab: Cross-site scripting (XSS) in JupyterLab via crafted language package (jupyter

IV. Related Vulnerabilities

Same product: jupyterlab
Same vendor: jupyterlab
Same weakness: CWE-88

V. Comments for CVE-2026-102904

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