CVE-2026-8168 Denial-of-service vulnerability in the SVG parser and renderer impacts Qt
Attackers can crash applications using the Qt SVG module by providing a crafted SVG file with deeply nested elements, causing stack exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-8168?
CVE-2026-8168 is a high-severity denial of service vulnerability in qt, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-674
Which versions are affected by CVE-2026-8168?
Linux distribution packages (4)
qt6 Red Hat:hummingbird:1 | All versions | 0:6.11.2-1.1.hum1 |
qt6-filesystem Red Hat:hummingbird:1 | All versions | 0:6.11.2-1.1.hum1 |
qt6-rpm-macros Red Hat:hummingbird:1 | All versions | 0:6.11.2-1.1.hum1 |
qt6-srpm-macros Red Hat:hummingbird:1 | All versions | 0:6.11.2-1.1.hum1 |
How do I fix CVE-2026-8168?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-8168 being exploited?
There is no known exploitation of CVE-2026-8168 in the wild and no public exploit code.
Sources
Also known as AZL-110127, DEBIAN-CVE-2026-8168, GHSA-4f98-277j-6qvj, RHSA-2026:80569, UBUNTU-CVE-2026-8168.