Security Issue CVE-2026-114369 - Resource exhaustion (denial of service) vulnerability in the WebSocket handshake handling of QWebSocket and QWebSocketServer impacts Qt Framework

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-114369
StatePUBLISHED
AssignerQt
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-12 12:18:19 UTC
Updated2026-11-12 12:18:19 UTC
DescriptionResource exhaustion vulnerability in the Qt Framework QWebSocket and QWebSocketServer classes of the Qt WebSockets module

Risk And Classification

Primary CVSS: v4.0 2.7 LOW from a59d8014-47c4-4630-ab43-e1b13cbe58e3

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/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:A/V:X/RE:L/U:Clear

Problem Types: CWE-407 | CWE-407 CWE-407 Inefficient Algorithmic Complexity

VersionSourceTypeScoreSeverityVector
4.0a59d8014-47c4-4630-ab43-e1b13cbe58e3Secondary2.7LOWCVSS: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/C...
4.0CNACVSS2.7LOWCVSS: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...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/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:A/V:X/RE:L/U:Clear

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Qt Qt Framework unknown 5.15.0 python Not specified
CNA Qt Qt Framework affected 5.15.0 6.8.9 python Not specified
CNA Qt Qt Framework affected 6.9.0 6.12.0 python Not specified

References

ReferenceSourceLinkTags
codereview.qt-project.org/c/qt/qtwebsockets/+/772146 a59d8014-47c4-4630-ab43-e1b13cbe58e3 codereview.qt-project.org
www.qt.io/security-advisories a59d8014-47c4-4630-ab43-e1b13cbe58e3 www.qt.io
codereview.qt-project.org/c/qt/qtwebsockets/+/772145 a59d8014-47c4-4630-ab43-e1b13cbe58e3 codereview.qt-project.org
codereview.qt-project.org/c/qt/qtwebsockets/+/772144 a59d8014-47c4-4630-ab43-e1b13cbe58e3 codereview.qt-project.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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