CVE-2026-107457
Memory corruption vulnerability in QMqttClient impacts Qt MQTT
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.
INFO
Published Date :
Nov. 2, 2026, 9:17 a.m.
Last Modified :
Nov. 2, 2026, 9:17 a.m.
Remotely Exploit :
Yes !
Source :
a59d8014-47c4-4630-ab43-e1b13cbe58e3
Affected Products
The following products are affected by CVE-2026-107457
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | a59d8014-47c4-4630-ab43-e1b13cbe58e3 | ||||
| CVSS 4.0 | LOW | a59d8014-47c4-4630-ab43-e1b13cbe58e3 |
Solution
- Update the Qt MQTT module to the latest version.
- Recompile and redeploy applications using QMqttClient.
- Verify application stability after the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-107457.
| URL | Resource |
|---|---|
| https://codereview.qt-project.org/c/qt/qtmqtt/+/762286 | |
| https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107457: |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-107457 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-107457
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-107457 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-107457 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by a59d8014-47c4-4630-ab43-e1b13cbe58e3
Nov. 02, 2026
Action Type Old Value New Value 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:U/V:X/RE:L/U:Green Added CWE CWE-787 Added CWE CWE-129 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/107xxx/CVE-2026-107457.json">CVE-2026-107457</a> Added Reference https://codereview.qt-project.org/c/qt/qtmqtt/+/762286 Added Reference https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107457: