Out-of-bounds read vulnerability in CoAP message parsing impacts Qt CoAP

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-103653
StatePUBLISHED
AssignerQt
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-03 08:17:13 UTC
Updated2026-11-03 16:25:21 UTC
DescriptionAn 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).

Risk And Classification

Primary CVSS: v4.0 6.7 MEDIUM from a59d8014-47c4-4630-ab43-e1b13cbe58e3

CVSS:4.0/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

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
4.0a59d8014-47c4-4630-ab43-e1b13cbe58e3Secondary6.7MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/C...
4.0CNACVSS6.7MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/A...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
High
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: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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Qt Qt affected 5.13.0 6.8.8 python Not specified
CNA Qt Qt affected 6.9.0 6.11.2 python Not specified
CNA Qt Qt unaffected 5.13.0 python Not specified

References

ReferenceSourceLinkTags
codereview.qt-project.org/c/qt/qtcoap/+/761120 a59d8014-47c4-4630-ab43-e1b13cbe58e3 codereview.qt-project.org
wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products a59d8014-47c4-4630-ab43-e1b13cbe58e3 wiki.qt.io
codereview.qt-project.org/c/qt/qtcoap/+/760652 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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