CVE-2026-6210

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.

CVSS

No CVSS.

References

Link	Resource
https://codereview.qt-project.org/c/qt/qtsvg/+/724887
https://issues.oss-fuzz.com/issues/496327371

Configurations

No configuration.

History

06 May 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-06 12:16

Updated : 2026-05-07 15:10

NVD link : CVE-2026-6210

Mitre link : CVE-2026-6210

CVE.ORG link : CVE-2026-6210

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

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