CVE-2026-32696
LOWNanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash — SIGSEGV, remotely triggerable
Title source: cnaDescription
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.
Scores
CVSS v3
3.1
EPSS
0.0002
EPSS Percentile
5.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Details
CWE
CWE-476
Status
published
Products (2)
emqx/nanomq
< 0.24.7
nanomq/nanomq
>= 0.24.6, < 0.24.7
Published
Mar 30, 2026
Tracked Since
Mar 31, 2026