CVE-2026-54412— MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| LiamBindle | MQTT-C | ≤ 1.1.6 | affected |
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I. Basic Information for CVE-2026-54412
Vulnerability Information
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Vulnerability Title
MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()
Source: CVE Program / CVE List V5
Vulnerability Description
LiamBindle MQTT-C through version 1.1.6 contains a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response function in src/mqtt.c that allows a remote unauthenticated attacker controlling an MQTT broker - or able to inject MQTT traffic into an unencrypted session - to crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
Liam Bindle MQTT-C 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Liam Bindle MQTT-C是加拿大Liam Bindle个人开发者的一个用C语言编写的MQTT客户端。 LiamBindle MQTT-C 1.1.6及之前版本存在安全漏洞，该漏洞源于src/mqtt.c中的mqtt_unpack_publish_response()函数存在堆越界读取和整数下溢，可能允许远程未经验证的攻击者通过发送特制的PUBLISH数据包导致订阅的MQTT-C客户端崩溃并可能泄露相邻堆内存。
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 |
|---|---|---|---|---|
| LiamBindle | MQTT-C | 0 ~ 1.1.6 | - |
II. Public POCs for CVE-2026-54412
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10577 chars
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III. Intelligence Information for CVE-2026-54412
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News Coverage for CVE-2026-54412 (1)
- 🔗 CWE - CWE-191: Integer Underflow (Wrap or Wraparound) (4.20) Read full article technical-description
Vendor Pages for CVE-2026-54412 (1)
Other References for CVE-2026-54412 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-54412
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