CVE-2026-36590 — HIGH (7.5)

Vulnerability Description

An issue in EMQ NanoMQ v.0.24.9 allows a remote attacker to cause a denial of service via the nni_qos_db_set function in broker_tcp.c component

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Emqx	Nanomq	0.24.9

Related Weaknesses (CWE)

CWE-400 CWE-772

References

https://github.com/MoXie25/NanoMQ-Memory-Leak-Research.gitVendor Advisory
https://github.com/MoXie25/NanoMQ-Memory-Leak-Research/blob/main/README.mdThird Party Advisory
https://github.com/MoXie25/NanoMQ-Memory-Leak-Research/blob/main/README.mdThird Party Advisory

FAQ

What is CVE-2026-36590?

CVE-2026-36590 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue in EMQ NanoMQ v.0.24.9 allows a remote attacker to cause a denial of service via the nni_qos_db_set function in broker_tcp.c component

How severe is CVE-2026-36590?

CVE-2026-36590 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-36590?

Check the references section above for vendor advisories and patch information. Affected products include: Emqx Nanomq.