PT-2026-29116 · Nanomq · Nanomq

Grant-Yim · Published 2026-03-30 · Updated 2026-03-31 · CVE-2026-25627

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions NanoMQ versions prior to 0.24.8

Description NanoMQ MQTT Broker is an Edge Messaging Platform. Before version 0.24.8, the MQTT-over-WebSocket transport in NanoMQ could 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 copies bytes of the Remaining Length without verifying that the current receive buffer contains that many bytes, resulting in an out-of-bounds read. This can be triggered remotely through the WebSocket listener.

Recommendations Update NanoMQ to version 0.24.8 or later.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-25627

GHSA-W4RH-V3H2-J29X

Affected Products

Nanomq

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25627.json · Exploit
• 🔥 https://github.com/nanomq/nanomq/security/advisories/GHSA-w4rh-v3h2-j29x · Exploit
• https://github.com/nanomq/NanoNNG/pull/1405 · Patch
• https://github.com/nanomq/NanoNNG/commit/e80b30bad6d855593a68d18f2785bfaca6faf09e · Patch
• https://osv.dev/vulnerability/CVE-2026-25627 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-25627 · Security Note
• https://github.com/nanomq/nanomq/releases/tag/0.24.8 · Note
• https://twitter.com/CVEnew/status/2038916090357784767 · Twitter Post