CVE-2026-116372— MISP mispguard 绕过过滤规则漏洞
一分钟漏洞结论
影响对象
MISP misp-guard
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。
MISP mispguard 是一款安全过滤代理，其功能是根据配置的规则检查并阻断 MISP 数据源（feed）的响应。src/mispguard.py 中的 process_feed_response 方法负责在响应到达 MISP 实例之前对其进行评估。原始逻辑仅显式处理了 HTTP 状态码非 200 的情况：当状态码不是 200 时，系统会直接放行响应而不过滤，其假设是“非 200 的响应不会包含可被导入的事件数据”。然而，除 200 之外的其他 2xx 状态码（例如 201 Created、203 Non-A
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一、 漏洞 CVE-2026-116372 基础信息
漏洞信息
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Vulnerability Title
MISP mispguard: Feed responses with 2xx status codes other than 200 bypass filtering rules
来源: CVE Program / CVE List V5
Vulnerability Description
MISP mispguard is a security filtering proxy that inspects and blocks MISP feed responses based on configured rules. The process_feed_response method in src/mispguard.py was responsible for evaluating feed responses before they reached the MISP instance. The original logic only explicitly handled the case where the HTTP status code was not 200 by passing the response through without filtering, on the assumption that non-200 responses would not carry ingestible event data. However, HTTP 2xx status codes other than 200 (such as 201 Created, 203 Non-Authoritative Information, and 206 Partial Content) were also passed through unfiltered. Because MISP may still ingest content from these responses, a malicious or compromised feed host could return a 203 or 206 status code with arbitrary content, effectively bypassing all of mispguard's filtering rules. This allowed unfiltered or malicious feed data to be ingested into the MISP instance, undermining the security controls that mispguard is designed to enforce. The vulnerability requires the attacker to control or compromise a feed endpoint configured in the MISP instance. No authentication or user interaction is required beyond the feed polling mechanism already in place.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| MISP | misp-guard | 0 ~ 1.3 |
cpe:2.3:a:misp:misp-guard:*:*:*:*:*:*:*:*
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二、漏洞 CVE-2026-116372 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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