What’s Vulnerable › Vulnerabilities

CVE-2026-8168: Denial-of-service vulnerability in the SVG parser and renderer impacts Qt

• Severity: high (CVSS 7.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-19 · updated 2026-10-19
• Weakness: CWE-674

Description

Uncontrolled recursion in the SVG parser and renderer of the Qt SVG module (QtSvg) in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted SVG file with deeply nested elements.

Affected products

• Qt: from 4.1.0 before 6.8.9; from 6.9.0 before 6.11.2 — fixed in 6.11.2, 6.8.9

How to fix

Upgrade to a fixed version: Qt 6.11.2, 6.8.9. Check the vendor advisory for mitigations.

References

• https://codereview.qt-project.org/c/qt/qtsvg/+/730501
• https://codereview.qt-project.org/c/qt/qtsvg/+/730590
• https://codereview.qt-project.org/c/qt/qtsvg/+/730591
• https://codereview.qt-project.org/c/qt/qtsvg/+/730892
• https://codereview.qt-project.org/c/qt/qtsvg/+/731257
• https://codereview.qt-project.org/c/qt/qtsvg/+/733245
• https://codereview.qt-project.org/c/qt/qtsvg/+/738811
• https://codereview.qt-project.org/c/qt/qtsvg/+/743488
• https://codereview.qt-project.org/c/qt/qtsvg/+/748966
• https://codereview.qt-project.org/c/qt/qtsvg/+/756512
• https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-8168:

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