CVE-2026-42266— jupyterlab: Extension Manager API/GUI Policy Discrepancy allowing 3rd party (malicious) extensions install via POST request.
Possible ATT&CK Techniques 1AI
T1195.002 · Compromise Software Supply ChainAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| jupyterlab | jupyterlab | >= 4.0.0, < 4.5.7 | affected |
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I. Basic Information for CVE-2026-42266
Vulnerability Information
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Vulnerability Title
jupyterlab: Extension Manager API/GUI Policy Discrepancy allowing 3rd party (malicious) extensions install via POST request.
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 (allowed_extensions_uris) is not correctly enforced by JupyterLab. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This vulnerability is fixed in 4.5.7.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
参数注入或修改
Source: NVD (National Vulnerability Database)
Vulnerability Title
JupyterLab 参数注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JupyterLab是JupyterLab开源的一个用于交互式和可重复计算的可扩展环境，基于 Jupyter Notebook 和架构。 jupyterlab 4.0.0版本至4.5.6版本存在参数注入漏洞，该漏洞源于PyPI Extension Manager的允许列表未正确执行，导致扩展安装不受限于默认PyPI索引。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| jupyterlab | jupyterlab | >= 4.0.0, < 4.5.7 | - |
II. Public POCs for CVE-2026-42266
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: jupyterlab
- CVE-2026-42557
jupyterlab: Command linker attributes in HTML enable one-cli - CVE-2025-59842
JupyterLab LaTeX typesetter links did not enforce `noopener` - CVE-2024-43805
HTML injection in Jupyter Notebook and JupyterLab leading to - CVE-2024-22420
Stored cross site scripting in Markdown Preview in JupyterLa - CVE-2024-22421
Potential authentication and CSRF tokens leak in JupyterLab
Same vendor: jupyterlab
- CVE-2026-42557
jupyterlab: Command linker attributes in HTML enable one-cli - CVE-2025-59842
JupyterLab LaTeX typesetter links did not enforce `noopener` - CVE-2025-30370
jupyterlab-git has a command injection vulnerability in "Ope - CVE-2024-43805
HTML injection in Jupyter Notebook and JupyterLab leading to - CVE-2024-39700
Remote Code Execution (RCE) vulnerability in jupyterlab exte
Same weakness: CWE-88
V. Comments for CVE-2026-42266
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