What is CVE-2026-25627?

CVE-2026-25627 is a medium-severity vulnerability in Nanomq, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-03-30.

How severe is CVE-2026-25627?

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

Out-of-bounds Read in Nanomq

CVE-2026-25627

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header w…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (4.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Nanomq — versions < 0.24.8

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

https://github.com/nanomq/nanomq/security/advisories/GHSA-w4rh-v3h2-j29x (x_refsource_CONFIRM)
https://github.com/nanomq/NanoNNG/pull/1405 (x_refsource_MISC)
https://github.com/nanomq/NanoNNG/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e (x_refsource_MISC)
https://github.com/nanomq/nanomq/releases/tag/0.24.8 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-25627?: CVE-2026-25627 is a medium-severity vulnerability in Nanomq, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-03-30.
How severe is CVE-2026-25627?: Medium severity. CVSS v3 base score is 6.5 out of 10.