CVEvulnerability

CVE-2026-32696

7.5 HIGH Published 2026-03-30 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

Description

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.

Affected configurations

• emqx nanomq (< 0.24.7)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References