Bug 2454048

Summary: CVE-2026-4800 python-jupyterlab-widgets: lodash: Arbitrary code execution via untrusted input in template imports [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: python-jupyterlab-widgetsAssignee: Lumír Balhar <lbalhar>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: lbalhar, romain.geissler
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["9bea0361-156d-4476-b60c-effb975141e0"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
Last Closed: 2026-06-14 15:05:25 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2453496    

Description Jon Moroney 2026-04-01 20:24:07 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Lumír Balhar 2026-06-14 15:05:25 UTC 
jupyterlab_widgets bundles only lodash.isEqual (and its internal dependencies) via backbone.js. The _.template() function and all code paths leading to the vulnerable Function() constructor call are not compiled into the shipped static bundle. The templateSettings symbol present in the bundle belongs to underscore.js (backbone's dependency), not lodash.