CVE-2026-45151 PUBLISHED

NanoMQ: NULL Pointer Dereference

Assigner: GitHub_M
Reserved: 08.05.2026 Published: 29.05.2026 Updated: 29.05.2026

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In 0.24.8 and earlier, quic_stream_recv can dereference a null substream pointer when a substream is in reopen state. The code finishes the AIO with error but does not return before locking c->mtx.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CVSS Score: 2.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	High	Integrity	None	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	nanomq
Product	nanomq
Versions	Version <= 0.24.8 is affected

References

https://github.com/nanomq/nanomq/security/advisories/GHSA-9qhf-wgp4-p7w5

Problem Types

CWE-476: NULL Pointer Dereference CWE