CVE-2026-85221— MISP默认禁用TLS验证致中间人攻击
一分钟漏洞结论
影响对象
misp misp
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 在 中存在一个 TLS 证书验证不当的漏洞。 属性未被显式初始化，因此默认为 。当该值传递给 cURL 时，除非调用代码显式启用了该选项，否则 TLS 对等方验证实际上处于禁用状态。 因此，通过受影响的 实例建立的 HTTPS 连接可能会接受并非由受信任的证书颁发机构（CA）签发的证书。能够拦截或篡改 MISP 实例与远程 HTTPS 服务之间网络流量的攻击者，可以冒充该远程端点，从而实施中间人（Man-in-the-Middle）攻击。 成功利用该漏洞后，攻击者可以观察 MISP 传输的敏感信息（包括认
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一、 漏洞 CVE-2026-85221 基础信息
漏洞信息
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Vulnerability Title
MISP CurlClient TLS Peer Verification Disabled by Default Enables Man-in-the-Middle Attacks
来源: CVE Program / CVE List V5
Vulnerability Description
MISP contains an improper TLS certificate validation vulnerability in CurlClient. The CurlClient::$verifyPeer property was not explicitly initialized and therefore defaulted to null. When passed to cURL, this value effectively disabled TLS peer verification unless the calling code explicitly enabled it.
As a result, HTTPS connections made through affected CurlClient instances could accept certificates that were not issued by a trusted certificate authority. An attacker capable of intercepting or manipulating network traffic between a MISP instance and a remote HTTPS service could impersonate the remote endpoint and perform a man-in-the-middle attack.
Successful exploitation could allow an attacker to observe sensitive information transmitted by MISP, including authentication material or exchanged threat intelligence, and to modify responses returned to the MISP instance. The impact depends on the functionality using CurlClient and the data exchanged with the remote service.
The patch enables TLS peer verification by default while preserving explicit support for configured self-signed certificates. It also corrects the self-signed certificate handling in SyncTool so that peer verification is disabled only when no pinned CA certificate is configured.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-85221 的公开POC
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CVE-2026-85221 补丁与修复 (1)
同批安全公告 · misp · 2026-09-03 · 共 9 条
| CVE-2026-85216 | 9.5 CRITICAL | MISP 空/无效凭据 LDAP 认证绕过漏洞 |
| CVE-2026-85236 | 8.8 HIGH | MISP cullEmptyEvents CSRF导致GET请求不可逆删除事件漏洞 |
| CVE-2026-85237 | 8.6 HIGH | 邮箱OTP验证缺少限流导致暴力破解认证 |
| CVE-2026-85238 | 7.6 HIGH | MISP CustomAuth 认证会话固定导致的劫持漏洞 |
| CVE-2026-85239 | 7.1 HIGH | MISP 事件模板定义校验绕过致服务中断 |
| CVE-2026-85227 | 6.1 MEDIUM | MISP 反射型跨站脚本漏洞 |
| CVE-2026-85226 | 5.3 MEDIUM | MISP OnDemand 相关引擎访问控制缺失漏洞 |
| CVE-2026-85230 | 5.3 MEDIUM | MISP Dashboard 按钮部件 JavaScript 注入漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-85221
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