Bug 2491988

Summary: CVE-2026-44727 python-jupyter-server-terminals: Jupyter Server: Remote Code Execution via stored Cross-Site Scripting in nbconvert handlers [fedora-43]
Product: [Fedora] Fedora Reporter: jjulien
Component: python-jupyter-server-terminalsAssignee: Lumír Balhar <lbalhar>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 43CC: lbalhar, romain.geissler
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c4fa59be-7ba4-4b70-8864-f306f4259893"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-06-26 07:29:01 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: 2491516    

Description jjulien 2026-06-23 21:36:24 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 2026-06-26 07:29:01 UTC 
The fix for this will land in python-jupyter-server.