CVE-2026-6210 Affecting qt6-svg package, versions <6.10.2-6


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (20th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-QT6SVG-16638644
  • published11 May 2026
  • disclosed6 May 2026

Introduced: 6 May 2026

CVE-2026-6210  (opens in a new tab)

How to fix?

Upgrade Debian:unstable qt6-svg to version 6.10.2-6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qt6-svg package and not the qt6-svg package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1