PT-2026-41372 · Freertos · Coremqtt

Epsilon · Published 2026-05-15 · Updated 2026-05-15 · CVE-2026-8686

Mitre

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-8686

Affected Products

Coremqtt

References · 4

• https://github.com/FreeRTOS/coreMQTT/releases/tag/v5.0.1 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-8686 · Security Note
• https://aws.amazon.com/security/security-bulletins/2026-032-aws · Vendor Advisory
• https://github.com/FreeRTOS/coreMQTT/security/advisories/GHSA-6qh9-r6jp-2wxc · Note