A memory corruption vulnerability in the QMqttClient class of the Qt MQTT module. Under certain MQTT 5 connection settings between client and server, QMqttClient may corrupt memory, which can cause the application to crash.
History

Tue, 03 Nov 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Mon, 02 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 02 Nov 2026 08:45:00 +0000

Type Values Removed Values Added
Description A memory corruption vulnerability in the QMqttClient class of the Qt MQTT module. Under certain MQTT 5 connection settings between client and server, QMqttClient may corrupt memory, which can cause the application to crash.
Title Memory corruption vulnerability in QMqttClient impacts Qt MQTT
First Time appeared Qt
Qt qt
Qt qtmqtt
Weaknesses CWE-129
CWE-787
CPEs cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qtmqtt:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qtmqtt
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Green'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published: 2026-11-02T08:38:12.500Z

Updated: 2026-11-02T19:21:56.150Z

Reserved: 2026-10-08T05:22:08.839Z

Link: CVE-2026-107457

cve-icon Vulnrichment

Updated: 2026-11-02T19:21:52.018Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-02T09:17:36.430

Modified: 2026-11-02T20:17:27.777

Link: CVE-2026-107457

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-11-02T08:38:12Z

Links: CVE-2026-107457 - Bugzilla