CVE-2026-73863— NanoMQ MQTT v5 订阅解析堆溢出漏洞
一分钟漏洞结论
影响对象
nanomq nanomq
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's broker-side MQTT v5 nmq_subinfo_decode() function in nng/src/sp/protocol/mqtt/mqtt_parser.c reuses len_of_varint from the outer Properties Length while parsing each SUBSCRIPTION_IDENTIFIER. A remote client c
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-73863 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
NanoMQ: Heap-Buffer-Overflow in `nmq_subinfo_decode()` During MQTT v5 SUBSCRIBE Parsing
来源: CVE Program / CVE List V5
Vulnerability Description
NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's broker-side MQTT v5 nmq_subinfo_decode() function in nng/src/sp/protocol/mqtt/mqtt_parser.c reuses len_of_varint from the outer Properties Length while parsing each SUBSCRIPTION_IDENTIFIER. A remote client can send a SUBSCRIBE packet with a multi-byte Properties Length and repeated subscription identifiers, causing get_var_integer() to begin at an incorrect offset and read beyond the heap message buffer. The flaw is reachable through the broker receive path and can crash the broker, while the separately reported topic-option off-by-one occurs later and is not this vulnerability. This issue is fixed in version 0.24.14.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:H
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-73863 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-73863 的情报信息
请登录查看更多情报信息。
CVE-2026-73863 补丁与修复 (2)
CVE-2026-73863 厂商页面 (1)
CVE-2026-73863 其他参考 (1)
同批安全公告 · nanomq · 2026-09-18 · 共 3 条
| CVE-2026-44639 | 3.7 LOW | NanoMQ MQTT v5属性解析拒绝服务漏洞 |
| CVE-2026-61633 | 2.0 LOW | NanoMQ UNSUBSCRIBE解码器无限循环导致远程拒绝服务 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-73863
暂无评论