---
cve: "CVE-2026-44640"
severity: "MEDIUM"
cvss: 4.5
epss: "0.1%"
vendor: "nanomq"
kev: false
exploited: false
published: "2026-05-29 19:28:47"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T22:28:16+02:00"
---

# CVE-2026-44640

> 4.5 MEDIUM · 🧪 PoC

## Beschreibung

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to 0.24.14, aio->prov_data is stored as nni_quic_conn* during dialing, but read as ex_quic_conn* during dialer close. This type confusion causes invalid object interpretation and leads to close-path hang/crash behavior. This vulnerability is fixed in 0.24.14.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 16bdb38921e7bbeab887cf229c2eb145889dfa88 (Commit)

## Referenzen

- <https://github.com/nanomq/nanomq/security/advisories/GHSA-9fgw-v323-jmjj>
- <https://github.com/nanomq/nanomq/releases/tag/0.24.14>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44640) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_