CVE-2026-103653 PUBLISHED

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

Assigner: Qt
Reserved: 01.10.2026 Published: 03.11.2026 Updated: 03.11.2026

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).

Metrics

CVSS 4.0

CVSS Vector: 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/AU:Y/R:U/RE:L/U:Amber
CVSS Score: 6.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	qt
Product	Qt
Versions	Default: unaffected affected from 5.13.0 to 6.8.8 (incl.) affected from 6.9.0 to 6.11.2 (incl.) unaffected from 0 to 5.13.0 (excl.)

CVE-2026-103653 PUBLISHED

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

Metrics

Product Status

References

Problem Types

Impacts