---
cve: "CVE-2026-32696"
severity: "LOW"
cvss: 3.1
epss: "40%"
vendor: "nanomq"
kev: false
exploited: false
published: "2026-03-30 21:17:09"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T12:44:50+02:00"
---

# CVE-2026-32696

> 3.1 LOW · 🧪 PoC

## Beschreibung

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username="%u", password="%P"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7.

## CVSS-Vektor

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

| 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 | Gering | warn |

## Patch verfügbar (OSV)

- 53afcd687801f3efefb8b333c2a9200ed1a35979 (Commit)
- c20aa27e5290bb480a5315099952480d35f37a8b (Commit)

## Referenzen

- <https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p>
- <https://github.com/nanomq/NanoNNG/pull/1394>
- <https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b>
- <https://github.com/nanomq/nanomq/releases/tag/0.24.7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-32696) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_