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I. Basic Information for CVE-2026-33215
Vulnerability Information

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Vulnerability Title
NATS is vulnerable to MQTT hijacking via Client ID
Source: NVD (National Vulnerability Database)
Vulnerability Description
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server provides an MQTT client interface. Prior to versions 2.11.15 and 2.12.5, Sessions and Messages can by hijacked via MQTT Client ID malfeasance. Versions 2.11.15 and 2.12.5 patch the issue. No known workarounds are available.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nats-Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nats-Server是Nats开源的一个用于 Nats.io、云和边缘本机消息传递系统的高性能服务器。 NATS-Server 2.11.15之前版本和2.12.5之前版本存在安全漏洞,该漏洞源于MQTT客户端ID不当操作,可能导致会话和消息被劫持。
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
VendorProductAffected VersionsCPESubscribe
nats-ionats-server < 2.11.15 -
II. Public POCs for CVE-2026-33215
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III. Intelligence Information for CVE-2026-33215
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IV. Related Vulnerabilities
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