CVE-2026-8168
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 7.1 HIGHCVSS: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/M
- EPSS
- 0.40% probability · 34th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Source
- a59d8014-47c4-4630-ab43-e1b13cbe58e3
EPSS moved from 0.4% on 20 October 2026 to 0.4% on 26 October 2026.
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:
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.