Bug 2489201

Summary: CVE-2026-40186 jupyterlab: ApostropheCMS: sanitize-html allowedTags Bypass via Entity-Decoded Text in nonTextTags Elements [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: jupyterlabAssignee: Lumír Balhar <lbalhar>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: lbalhar, python-packagers-sig, romain.geissler
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["317fc795-bb3a-455b-976d-8851b0c392e1"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
Last Closed: 2026-06-17 10:13:16 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: 2458831    

Description Ganesh 2026-06-16 13:55:35 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 2026-06-17 10:13:16 UTC 
JupyterLab bundles sanitize-html 2.12.1. CVE-2026-40186 is a regression introduced in 2.17.2 and fixed in 2.17.3 — five minor releases ahead of 2.12.1. The bundled version predates the regression entirely and is not affected.