---
cve: "CVE-2026-22040"
severity: "MEDIUM"
cvss: 5.3
epss: "22%"
vendor: "nanomq"
kev: false
exploited: false
published: "2026-03-04 22:16:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T04:55:46+02:00"
---

# CVE-2026-22040

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In version 0.24.6, by generating a combined traffic pattern of high-frequency publishes and rapid reconnect/kick-out using the same ClientID and massive subscribe/unsubscribe jitter, it is possible to reliably trigger heap memory corruption in the Broker process, causing it to exit immediately with SIGABRT due to free(): invalid pointer. As of time of publication, no known patched versions are available.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- dc3a3136cd82d5c005b8cd26a65fe53beaaf0eb9 (Commit)

## Referenzen

- <https://github.com/nanomq/nanomq/security/advisories/GHSA-v57q-w88m-424r>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-22040) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_