CVE-2026-21888

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-21888
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/nanomq/nanomq/issues/2192 Issue Tracking
https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5 Exploit Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:emqx:nanomq:*:*:*:*:*:*:*:*
History

17 Mar 2026, 19:20

Type Values Removed Values Added
Summary
  • (es) NanoMQ MQTT Broker (NanoMQ) es una Plataforma de Mensajería de Borde integral. Análisis de enteros de bytes variables de MQTT v5 fuera de límites: get_var_integer() acepta varints de 5 bytes sin comprobaciones de límites; desencadena de forma fiable una lectura fuera de límites / caída cuando se compila con ASan. Esto afecta a la versión 0.24.6 y anteriores.
CPE cpe:2.3:a:emqx:nanomq:*:*:*:*:*:*:*:*
First Time Emqx
Emqx nanomq
References () https://github.com/nanomq/nanomq/issues/2192 - () https://github.com/nanomq/nanomq/issues/2192 - Issue Tracking
References () https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5 - () https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5 - Exploit, Vendor Advisory

11 Mar 2026, 16:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-11 16:16

Updated : 2026-03-17 19:20

NVD link : CVE-2026-21888

Mitre link : CVE-2026-21888

CVE.ORG link : CVE-2026-21888

JSON object : View

Products Affected

emqx

  • nanomq
CWE
CWE-125

Out-of-bounds Read