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CVE-2026-8168
Denial-of-service vulnerability in the SVG parser and renderer impacts Qt
High7.1EPSS 0.40%
- Published
- Updated
- Reserved
- Assigned by
- Qt
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.
Timeline
ID reserved
By Qt
- 5 months later
· 5 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| QtCNA (assigner) | 4.0 | High7.1 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | High7.1 | 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 |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Weakness
Affected products
References (11)
- Propagate QSvgExtraStates variables to pattern and mask elements (opens in a new tab)vendor-advisory
- Fix rendering causing stack overflow (opens in a new tab)patch
- Fix resolving paint servers going through stack overflow (opens in a new tab)patch
- Fix stack overflow caused by recursive calls of destructors (opens in a new tab)patch
- Add a test for deeply nested SVG files (opens in a new tab)patch
- Add baseline test for deeply nested elements (opens in a new tab)patch
- Speed up QSvgStructureNode::releaseDescendants() (opens in a new tab)patch
- Fix stack overflow in detectCycles (opens in a new tab)patch
- Use bottom tested loop in detectCycles() (opens in a new tab)patch
- Apply and revert styles iteratively (opens in a new tab)patch
- Propagate QSvgExtraStates variables to pattern and mask elements (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-8168)Record last updated .