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CVE-2026-73627— JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass

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 jupyterlab是JupyterLab基金会的一款Web应用开发框架。 jupyterlab 4.1.0版本至4.5.9版本和4.6.0版本至4.6.1版本存在处理逻辑错误漏洞，该漏洞源于插件管理器锁定规则执行绕过，两个服务端执行漏洞允许已认证用户通过直接请求 /lab/api/plugins 端点绕过管理员锁定规则，启用或禁用已锁定的插件，包括多插件扩展的子插件及通过“全部锁定”机制锁定的插件，可能导致数据完整性受影响并绕过加固或限制（如下载/上传限制）。

CVSS 6.0 · Medium EPSS 0.42% · P34

Affected Version Matrix 2

VendorProduct Version RangeStatus
jupyterlab jupyterlab 4.6.0≤ 4.6.1 affected
4.1.0≤ 4.5.9 affected
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I. Basic Information for CVE-2026-73627

Vulnerability Information
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Vulnerability Title
JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
JupyterLab (pip package 'jupyterlab') versions >=4.1.0,<=4.5.9 and >=4.6.0,<=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked — including child plugins of multi-plugin extensions and plugins locked via the 'lock all' mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端安全的客户端实施
Source: CVE Program / CVE List V5
Vulnerability Title
jupyterlab 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JupyterLab jupyterlab是JupyterLab基金会的一款Web应用开发框架。 jupyterlab 4.1.0版本至4.5.9版本和4.6.0版本至4.6.1版本存在处理逻辑错误漏洞，该漏洞源于插件管理器锁定规则执行绕过，两个服务端执行漏洞允许已认证用户通过直接请求 /lab/api/plugins 端点绕过管理员锁定规则，启用或禁用已锁定的插件，包括多插件扩展的子插件及通过“全部锁定”机制锁定的插件，可能导致数据完整性受影响并绕过加固或限制（如下载/上传限制）。
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 4.6.0 ~ 4.6.1 -
jupyterlab jupyterlab 4.1.0 ~ 4.5.9 -

II. Public POCs for CVE-2026-73627

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III. Intelligence Information for CVE-2026-73627

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Vendor Advisories for CVE-2026-73627 (2)

Same Patch Batch · jupyterlab · 2026-08-13 · 4 CVEs total

CVE-2026-73417 8.6 HIGH JupyterLab: Cross-site scripting (XSS) via crafted settings file (`overrides.json`)
CVE-2026-73626 7.5 HIGH JupyterLab before 4.6.2 Authentication Bypass via PyPIExtensionManager
CVE-2026-73416 6.1 MEDIUM jupyterlab: PyPI extension blocklist package-name canonicalization bypass

IV. Related Vulnerabilities

Same product: jupyterlab
Same vendor: jupyterlab
Same weakness: CWE-602

V. Comments for CVE-2026-73627

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