CVE-2026-8168

7.1High

Published 19 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash

7.1High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive
Impact: High impact on availability
Weakness: CWE-674

Impact

Attackers can crash applications rendering user-supplied SVGs via stack exhaustion. They need to get the application or user to parse a specially crafted, deeply nested SVG file.

Root cause

The QtSvg parser and renderer lacks a recursion depth limit when processing nested SVG elements, leading to uncontrolled recursion.

Affected systems

Qt Group Qt (QtSvg module). Versions not listed — check the vendor advisory.

CVSS v4.0 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Fix & remediation

Apply the QtSvg patches from the upstream Qt code review commits. If patching is delayed, avoid rendering untrusted SVG files or sanitize inputs to reject deeply nested elements.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-8168