Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-34608— nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read

Quick assessment

Affected
nanomq nanomq
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NanoMQ是美国EMQ开源的一款用于物联网边缘平台的轻量级快速 MQTT Broker。 NanoMQ存在安全漏洞，该漏洞源于hook_work_cb函数使用cJSON_Parse解析消息体时存在越界读取，可能导致访问未分配的内存。

CVSS 4.9 · Medium EPSS 0.36% · P29
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-34608

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read
Source: CVE Program / CVE List V5
Vulnerability Description
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ's webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng's allocation padding (extra 32 bytes of zeros for non-power-of-two sizes <1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two >=1024 (no padding added). This issue has been patched in version 0.24.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
NanoMQ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NanoMQ是美国EMQ开源的一款用于物联网边缘平台的轻量级快速 MQTT Broker。 NanoMQ存在安全漏洞，该漏洞源于hook_work_cb函数使用cJSON_Parse解析消息体时存在越界读取，可能导致访问未分配的内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nanomq nanomq < 0.24.10 -

II. Public POCs for CVE-2026-34608

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-34608

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-34608 (1)

Vendor Advisories for CVE-2026-34608 (1)

Vendor Pages for CVE-2026-34608 (1)

IV. Related Vulnerabilities

Same product: nanomq
Same vendor: nanomq
Same weakness: CWE-125