Bug 2563029 (CVE-2026-116796)

Summary: CVE-2026-116796 highcharts: highcharts: Arbitrary script execution via unsanitized SVG link attributes
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin, rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Highcharts. An attacker who can supply chart text configurations can execute arbitrary script in a victim's browser session. The library fails to validate URL schemes on certain Scalable Vector Graphics (SVG) anchor link attributes, allowing malicious JavaScript links to persist into exported chart output. When a user opens the exported chart and clicks the link, the injected script runs within the context of the user's browser origin.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-28 17:32:33 UTC 
Highcharts JS is a JavaScript charting library based on SVG. From 10.3.2 until 11.4.9, 12.6.2, and 13.1.1, Highcharts accepts an SVG anchor xlink:href attribute without applying the allowed-scheme check used for href and src. An attacker who controls a chart text option can preserve a javascript URL in serialized chart output. When exported or server-rendered SVG is parsed again and a user activates the link, script runs in the origin of that document. This issue is fixed in 11.4.9, 12.6.2 and 13.1.1.