CVE-2026-16732— Fastify 信任管理问题漏洞
一分钟漏洞结论
影响对象
fastify fastify
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。
Fastify是Fastify团队开源的一个高性能的Node.js Web框架。 Fastify 5.8.3至5.12.1之前版本存在信任管理问题漏洞，该漏洞源于对转发请求头的信任管理不当，可能导致攻击者绕过前端代理直接访问Fastify并伪造转发请求字段，造成主机注入、HTTPS强制绕过、安全Cookie和CSRF来源绕过、基于主机的路由和缓存中毒。
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一、 漏洞 CVE-2026-16732 基础信息
漏洞信息
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Vulnerability Title
fastify vulnerable to X-Forwarded-* spoofing under trustProxy hop-count
来源: CVE Program / CVE List V5
Vulnerability Description
fastify is a fast and low overhead web framework for Node.js. Impact: the fix for CVE-2026-3635 added a guard on the forwarded-header reads used to derive the request host, protocol, hostname, ip, and ips values, checking the connecting address. That guard closes the IP, CIDR, and custom-function forms of trustProxy correctly, because those forms compile to predicates that inspect the connecting address. The hop-count form, where trustProxy is set to a number, compiles to a predicate that structurally ignores the address, so the guard is always satisfied for any hop count of one or more. Applications configured with a numeric trustProxy value, such as trustProxy set to 1 for a single reverse proxy, remain vulnerable: an attacker who can reach the Fastify origin directly, bypassing the front-facing proxy, can spoof the forwarded request fields exactly as in the unpatched version. The impact class matches the parent CVE-2026-3635, including host injection in generated URLs, HTTPS-enforcement bypass, secure-cookie and CSRF-origin bypass, and host-based routing and cache poisoning. Affected versions are fastify from 5.8.3 up to but not including 5.12.1. Patches: patched in fastify 5.12.1, where the numeric form of trustProxy is disabled at runtime and removed from the TypeScript type union. Workarounds: migrate to an IP, CIDR, or custom-function trustProxy value that validates the connecting address, and ensure the Fastify origin is only reachable through the trusted proxy chain.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
来源: CVE Program / CVE List V5
Vulnerability Title
Fastify 信任管理问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Fastify是Fastify团队开源的一个高性能的Node.js Web框架。 Fastify 5.8.3至5.12.1之前版本存在信任管理问题漏洞，该漏洞源于对转发请求头的信任管理不当，可能导致攻击者绕过前端代理直接访问Fastify并伪造转发请求字段，造成主机注入、HTTPS强制绕过、安全Cookie和CSRF来源绕过、基于主机的路由和缓存中毒。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-16732 的公开POC
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CVE-2026-16732 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-16732
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