Cyber Posture

CVE-2026-8686

High

Published: 15 May 2026

Published
15 May 2026
Modified
15 May 2026
KEV Added
—
Patch
—
CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0003 9.3th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-8686 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Amazon (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, ranked at the 9.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

NVD Description

Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet. To remediate this issue, users should upgrade to v5.0.1.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-125

Affected Products

Amazon
—
inferred from references and description; NVD did not file a CPE for this CVE

References