CVE-2026-25627

6.5 MEDIUM
Published: March 30, 2026 Modified: April 02, 2026
View on NVD

Description

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 while providing a much shorter actual payload. The code path copies Remaining Length bytes without verifying that the current receive buffer contains that many bytes, resulting in an out-of-bounds read (ASAN reports OOB / crash). This is remotely triggerable over the WebSocket listener. This issue has been patched in version 0.24.8.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nanomq/NanoNNG/pull/1405
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/nanomq/nanomq/releases/tag/0.24.8
Source: security-advisories@github.com
Release Notes
https://github.com/nanomq/nanomq/security/advisories/GHSA-w4rh-v3h2-j29x
Source: security-advisories@github.com
Exploit Vendor Advisory
https://github.com/nanomq/nanomq/security/advisories/GHSA-w4rh-v3h2-j29x
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Vendor Advisory

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
0.0%
3th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

emqx