CVE-2026-103653
Out-of-bounds read vulnerability in CoAP message parsing impacts Qt CoAP
Description
An out-of-bounds read vulnerability in the Qt CoAP message parsing (QCoapInternalReply::createFromFrame()) of the Qt CoAP module. Processing a malformed CoAP message can cause an application using Qt CoAP to crash (loss of availability) or to continue operating on incorrect data (potential loss of integrity).
INFO
Published Date :
Nov. 3, 2026, 8:17 a.m.
Last Modified :
Nov. 3, 2026, 8:17 a.m.
Remotely Exploit :
Yes !
Source :
a59d8014-47c4-4630-ab43-e1b13cbe58e3
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | a59d8014-47c4-4630-ab43-e1b13cbe58e3 | ||||
| CVSS 4.0 | MEDIUM | a59d8014-47c4-4630-ab43-e1b13cbe58e3 |
Solution
- Update the Qt CoAP module.
- Apply vendor patches for the module.
- Recompile applications using the module.
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-2026-103653.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-103653 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-2026-103653
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-2026-103653 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-103653 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.
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New CVE Received by a59d8014-47c4-4630-ab43-e1b13cbe58e3
Nov. 03, 2026
Action Type Old Value New Value Added Description An out-of-bounds read vulnerability in the Qt CoAP message parsing (QCoapInternalReply::createFromFrame()) of the Qt CoAP module. Processing a malformed CoAP message can cause an application using Qt CoAP to crash (loss of availability) or to continue operating on incorrect data (potential loss of integrity). Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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:Y/R:U/V:X/RE:L/U:Amber Added CWE CWE-125 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/103xxx/CVE-2026-103653.json">CVE-2026-103653</a> Added Reference https://codereview.qt-project.org/c/qt/qtcoap/+/760652 Added Reference https://codereview.qt-project.org/c/qt/qtcoap/+/761120 Added Reference https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-103653: