Bug 2520926

Summary: CVE-2026-73648 rubygem-rails-html-sanitizer: rails-html-sanitizer: Cross-Site Scripting vulnerability due to improper SVG sanitization [fedora-all]
Product: [Fedora] Fedora Reporter: jkelly <jkelly>
Component: rubygem-rails-html-sanitizerAssignee: Vít Ondruch <vondruch>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: jaruga, pvalena, ruby-packagers-sig, vondruch
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["f1ab548d-cbab-4c39-ab46-27579285c3b2"]}
Fixed In Version: Doc Type: ---
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Clone Of: Environment:
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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: 2515530    

Description jkelly 2026-08-21 09:06:51 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.

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVG_ALLOW_LOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute. Applications with non-default allowed tags that included SVG use or feImage elements could therefore permit external references; a same-origin external SVG referenced by use could execute scripts in the sanitized document's context, while feImage could load external images for tracking. Applications using the default allowed tags are not affected. This issue is fixed in version 1.7.1.