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CVE-2026-6210 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  TQtC
CVSS-B 8.7 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://codereview.qt-project.org/c/qt/qtsvg/+/724887 TQtC
https://issues.oss-fuzz.com/issues/496327371 TQtC

Weakness Enumeration

CWE-ID CWE Name Source
CWE-122 Heap-based Buffer Overflow TQtC  
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') TQtC  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-6210
NVD Published Date:
05/06/2026
NVD Last Modified:
05/06/2026
Source:
TQtC