CVE-2026-32696
This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.40% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- emqx/nanomq
- Source
- security-advisories@github.com
References
- https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8bPatch
- https://github.com/nanomq/NanoNNG/pull/1394Issue Tracking, Patch
- https://github.com/nanomq/nanomq/releases/tag/0.24.7Product, Release Notes
- https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3pExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.