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Vulnerability record · public intelligence
CVE-2026-8168
HIGH

Denial-of-service vulnerability in the SVG parser and renderer impacts Qt

Published Oct 19, 2026 · Updated Nov 3, 2026

Severity · CVSSHIGH · Not scored
Known exploitationNot listed
EPSS / likelihood0.40%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

Denial-of-service vulnerability in the SVG parser and renderer impacts Qt

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
LOW
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. Propagate QSvgExtraStates variables to pattern and mask elements ↗
  2. Fix rendering causing stack overflow ↗
  3. Fix resolving paint servers going through stack overflow ↗
  4. Fix stack overflow caused by recursive calls of destructors ↗
  5. Add a test for deeply nested SVG files ↗
  6. Add baseline test for deeply nested elements ↗
  7. Speed up QSvgStructureNode::releaseDescendants() ↗
  8. Fix stack overflow in detectCycles ↗
  9. Use bottom tested loop in detectCycles() ↗
  10. Apply and revert styles iteratively ↗
  11. Propagate QSvgExtraStates variables to pattern and mask elements ↗

Record history

Published Oct 19, 2026 · Last refreshed Nov 3, 2026

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