CVE-2026-109383— undici TLS证书验证绕过漏洞
一分钟漏洞结论
影响对象
undici undici
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。
undici 是 Node.js 的 HTTP 客户端库。在版本 4.0.0 至 6.29.0、7.0.0 至 7.30.0 以及 8.0.0 至 8.12.1 中，其 Agent 调度器（Agent dispatcher）在将构造函数选项转发至每个按来源（per-origin）连接的池之前，会通过基于 JSON 的深度克隆机制处理这些选项。由于 JSON 格式无法表示函数，调用方提供的包含 回调函数的 选项会在到达 TLS 层之前被静默丢弃。因此，尽管某些 TLS 对等方的证书本应通过自定义的 回调被拒绝，但由于
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一、 漏洞 CVE-2026-109383 基础信息
漏洞信息
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Vulnerability Title
undici vulnerable to TLS certificate validation bypass via dropped tls options in Agent
来源: CVE Program / CVE List V5
Vulnerability Description
undici is an HTTP client library for Node.js. In versions 4.0.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its Agent dispatcher passes its constructor options through a JSON-based deep clone before forwarding them to each per-origin pool, and because JSON cannot represent functions, a caller-supplied tls option containing a checkServerIdentity callback is silently dropped before it reaches the TLS layer. As a result, a TLS peer whose certificate a custom checkServerIdentity was written to reject, but which passes Node's default hostname and chain checks, is silently accepted. Because Agent is the default dispatcher behind request, fetch, and setGlobalDispatcher, this affects the path most applications use, and EnvHttpProxyAgent is affected on its direct and no-proxy routes as well, while only applications that pass a function-valued tls option such as a custom checkServerIdentity for certificate or public-key pinning are at risk. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, which preserve the tls option outside the JSON clone so custom verification callbacks are forwarded unchanged, and users should upgrade to one of those versions or later. As a workaround, pass the TLS options through connect instead of tls, or for proxied destinations use requestTls and proxyTls.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A: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-2026-109383 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-109383 其他参考 (1)
同批安全公告 · undici · 2026-10-15 · 共 9 条
| CVE-2026-109855 | 7.5 HIGH | undici WebSocket 客户端拒绝服务漏洞 |
| CVE-2026-87018 | 7.5 HIGH | undici 拒绝服务漏洞（TLS 1.2 证书变更重协商） |
| CVE-2026-109869 | 7.5 HIGH | undici 拒绝服务漏洞 |
| CVE-2026-109829 | 7.4 HIGH | undici 缓存投毒和跨用户披露漏洞 |
| CVE-2026-87029 | 5.9 MEDIUM | undici 拒绝服务漏洞：解压缩拦截器未处理异常 |
| CVE-2026-109932 | 5.9 MEDIUM | undici WebSocket 客户端拒绝服务漏洞 |
| CVE-2026-109841 | 5.9 MEDIUM | undici 子资源完整性绕过漏洞 |
| CVE-2026-109924 | 5.9 MEDIUM | undici EventSource解析器拒绝服务漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-109383
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