CVE-2026-109932— undici WebSocket 客户端拒绝服务漏洞
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 5.15.0 至 6.29.0、7.0.0 至 7.30.0 以及 8.0.0 至 8.12.1 中，其 WebSocket 客户端（包括 Node.js 内置暴露的 WebSocket 实现）可能被恶意或已受 compromise 的 WebSocket 服务器利用，导致进程内存耗尽。具体而言，每当客户端接收到一个 PING 帧时，会自动写入对应的 PONG 响应，并忽略来自 socket 写入操作的背压（backpressure）信号。因此，如果
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2026-109932 基础信息
漏洞信息
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Vulnerability Title
undici WebSocket client vulnerable to Denial of Service via unbounded automatic PONG buffering
来源: CVE Program / CVE List V5
Vulnerability Description
undici is an HTTP client library for Node.js. In versions 5.15.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its WebSocket client, including the bundled WebSocket exposed by Node.js, can be driven to exhaust process memory by a malicious or compromised WebSocket server. For every PING frame received, the client automatically writes a PONG response and ignores the backpressure signal from the socket write, so a server that streams small PING frames while never reading the client's PONGs makes the outbound write queue and heap grow without bound until the Node.js process runs out of memory and terminates. The attack is remote and unauthenticated, needs only a normal WebSocket connection, and is asymmetric, since small inbound PINGs produce a much larger retained outbound queue, with availability the only impact. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, which pause WebSocket frame parsing when the automatic PONG response hits socket backpressure and resume on drain, bounding the outbound queue, and users should upgrade to one of those versions or later. There is no workaround.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-109932 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-109932 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-2026-109383 | 7.4 HIGH | undici TLS证书验证绕过漏洞 |
| 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-2026-109841 | 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-2026-109932
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