What is CVE-2024-42649?

CVE-2024-42649 is a medium-severity vulnerability in Emqx Nanomq, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2025-07-14.

How severe is CVE-2024-42649?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Emqx Nanomq

CVE-2024-42649

NanoMQ v0.22.10 was discovered to contain a memory leak which allows attackers to cause a Denial of Service (DoS) via a crafted PUBLISH message.

Published 2025-07-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Emqx Nanomq — versions 0.22.10

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/nanomq/nanomq (Product)
github.com/songxpu/bug_report/blob/master/MQTT/NanoMQ/CVE-2024-42649.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-42649?: CVE-2024-42649 is a medium-severity vulnerability in Emqx Nanomq, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2025-07-14.
How severe is CVE-2024-42649?: Medium severity. CVSS v3 base score is 6.5 out of 10.