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CVE-2026-73627
Published:August 13, 2026
Updated:August 31, 2026
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.
Affected Packages
https://github.com/jupyterlab/jupyterlab.git (GITHUB):
Affected version(s) >=v4.1.0 <v4.5.10
Fix Suggestion:
Update to version v4.5.10
jupyterlab (PYTHON):
Affected version(s) >=4.6.0 <4.6.2
Fix Suggestion:
Update to version 4.6.2
jupyterlab (PYTHON):
Affected version(s) >=4.1.0 <4.5.10
Fix Suggestion:
Update to version 4.5.10
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CVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Client-Side Enforcement of Server-Side Security
EPSS
Base Score:
0.25