Heap Buffer Overflow Vulnerability in NanoMQ MQTT Broker
CVE-2026-32135

7.7HIGH

Key Information:

Vendor

NanoMQ

Status
NanoMQ
Vendor
CVE Published:
20 April 2026

What is CVE-2026-32135?

The NanoMQ MQTT Broker is vulnerable to a remotely triggerable heap buffer overflow due to an off-by-one error in the uri_param_parse function within its REST API. This flaw allows attackers to craft malicious HTTP requests that write a null byte beyond the allocated buffer for query parameters, potentially leading to arbitrary code execution or crashes. Users are advised to upgrade to version 0.24.11 or later, which addresses this vulnerability.

Affected Version(s)

nanomq < 0.24.11

References

https://github.com/nanomq/nanomq/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/nanomq/nanomq/issues/2247
x_refsource_MISC
https://github.com/nanomq/nanomq/commit/69a97b3b39cc218f0...
x_refsource_MISC

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.