CVE-2026-73627

JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass

Published Aug 13, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-414
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N'}

threat_severity

Important

Type Values Removed Values Added
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.
Title JupyterLab 4.6.0 Plugin Manager Lock-Rule Enforcement Bypass
First Time appeared Jupyter
Jupyter jupyterlab
Weaknesses CWE-602
CPEs cpe:2.3:a:jupyter:jupyterlab:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.0:-:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.0:rc0:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.1:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.2:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.3:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.4:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.5:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.6:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.5.7:*:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha0:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:jupyter:jupyterlab:4.6.0:alpha5:*:*:*:*:*:*
Vendors & Products Jupyter
Jupyter jupyterlab
References
Metrics cvssV4_0

{'score': 6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 30, 2026, 5:20 PM
Reserved
Aug 13, 2026, 11:17 AM
Status
Awaiting Analysis
Published
Aug 13, 2026, 12:17 PM
Modified
Sep 30, 2026, 6:18 PM
Severity
Important
Public date
Aug 13, 2026, 11:28 AM