CVE-2026-114369
Security Issue CVE-2026-114369 - Resource exhaustion (denial of service) vulnerability in the WebSocket handshake handling of QWebSocket and QWebSocketServer impacts Qt Framework
Resource exhaustion vulnerability in the Qt Framework QWebSocket and QWebSocketServer classes of the Qt WebSockets module
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: QtFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: QtFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: QtAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Qt Framework qt |
≥ 0; < 5.15.0 (unknown, python) ≥ 5.15.0; ≤ 6.8.9 (affected, python) ≥ 6.9.0; ≤ 6.12.0 (affected, python) Other versions: unaffected |
CNA: Qt |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 2.7 low |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/R:A/RE:L/U:Clear | CNA: Qt |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.qt.io/security-advisories?search=CVE-2026-114369CNA: Qt · vendor-advisory
- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772146CNA: Qt · patch
- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772145CNA: Qt · patch
- https://codereview.qt-project.org/c/qt/qtwebsockets/+/772144CNA: Qt · patch
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