Vulnerability Description
A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. When processing SVG marker references, the renderer retrieves a node by its id attribute and casts it to QSvgMarker* without verifying the node type. A non-marker element (such as a <line> element) that references itself as a marker triggers an out-of-bounds heap read due to the object size difference between QSvgLine and QSvgMarker, followed by an endless recursion that bypasses the marker recursion guard through incorrect virtual dispatch. The result is an application crash (denial of service). This issue affects Qt SVG: from 6.7.0 before 6.8.8, from 6.9.0 before 6.11.1.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-6210?
CVE-2026-6210 is a documented vulnerability. A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. When processing SVG marker references, the renderer retrieves a node by its id att...
How severe is CVE-2026-6210?
CVSS scoring is not yet available for CVE-2026-6210. Check NVD for updates.
Is there a patch for CVE-2026-6210?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.