Medium [CVE-2026-116796] Arbitrary script execution via unsanitized SVG link attributes
This medium-severity Red Hat Linux advisory covers CVE-2026-116796 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
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. 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.
This vulnerability is rated as having Moderate impact for Red Hat environments because successful exploitation requires multiple preconditions, including user interaction and non-default application processing workflows.
An attacker cannot execute code directly across the network; instead, malicious input must be accepted into chart configuration fields, rendered or exported as an SVG graphic, and subsequently parsed and clicked by a victim.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
- 11.4.9
- 12.6.2
- 13.1.1
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
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