Medium severityNVD Advisory· Published Nov 3, 2026

CVE-2026-103653

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).

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Affected products

Qt/Qt CoAPllm-fuzzy

Patches

Vulnerability mechanics

References

codereview.qt-project.org/c/qt/qtcoap/+/760652nvd
codereview.qt-project.org/c/qt/qtcoap/+/761120nvd
wiki.qt.io/List_of_known_vulnerabilities_in_Qt_productsnvd

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