Bug 2484663

Summary: CVE-2026-6322 jupyterlab: fast-uri: URI authority bypass due to improper delimiter handling [fedora-43]
Product: [Fedora] Fedora Reporter: Dhananjay Arunesh <darunesh>
Component: jupyterlabAssignee: Lumír Balhar <lbalhar>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 43CC: lbalhar, python-packagers-sig, romain.geissler
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["246db2a8-7bfc-40e2-bd19-8f384027bc46"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-06-14 14:50:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2466684    

Description Dhananjay Arunesh 2026-06-04 09:30:44 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 14:50:06 UTC 
fast-uri is bundled as a dependency of ajv (JSON Schema validator) and used exclusively for URI format validation in settings schemas. JupyterLab makes no security decisions (access control, routing, allowlists) based on URI normalization from fast-uri. No exploitable path exists.