Resource exhaustion vulnerability in the Qt Framework QWebSocket and QWebSocketServer classes of the Qt WebSockets module

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
qt Qt Framework unaffected
Version Status Constraints
0 unknown < 5.15.0
5.15.0 affected ≤ 6.8.9
6.9.0 affected ≤ 6.12.0

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Qt Subscribe
Qt Subscribe
Qtwebsockets Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://codereview.qt-project.org/c/qt/qtwebsockets/+/772144 cve-icon
https://codereview.qt-project.org/c/qt/qtwebsockets/+/772145 cve-icon
https://codereview.qt-project.org/c/qt/qtwebsockets/+/772146 cve-icon
https://www.qt.io/security-advisories?search=CVE-2026-114369 cve-icon
History

Thu, 12 Nov 2026 11:30:00 +0000

Type Values Removed Values Added
Description Resource exhaustion vulnerability in the Qt Framework QWebSocket and QWebSocketServer classes of the Qt WebSockets module
Title Security Issue CVE-2026-114369 - Resource exhaustion (denial of service) vulnerability in the WebSocket handshake handling of QWebSocket and QWebSocketServer impacts Qt Framework
First Time appeared Qt
Qt qt
Qt qtwebsockets
Weaknesses CWE-407
CPEs cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qtwebsockets:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qtwebsockets
References
Metrics cvssV4_0

{'score': 2.7, 'vector': '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-11-12T11:09:29.857Z

Reserved: 2026-10-21T10:56:06.723Z

Link: CVE-2026-114369

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses