CVE-2026-75975— fast-uri 畸形IPv6规范化导致服务器端请求伪造漏洞
一分钟漏洞结论
影响对象
fast-uri fast-uri
利用判断
存在公开或 AI PoC，应优先验证
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。
fast-uri 是一个用于 Node.js 的 URI 解析库。其针对带括号的 IPv6 字面量的自定义解析器未对完整的 IPv6 语法进行验证，因此可能导致权威部分（authority）中无效的尾随文本被静默丢弃，从而使格式错误的、由攻击者控制的 host 被转换为另一个有效的 IPv6 目标地址。 例如，带有无效尾随字符的带括号字面量会被归一化为未指定地址（unspecified address），此时 Node.js HTTP 客户端会通过回环接口连接到一个本地服务；而其他格式错误的字面量则可能被归一化为私
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一、 漏洞 CVE-2026-75975 基础信息
漏洞信息
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Vulnerability Title
fast-uri vulnerable to server-side request forgery via malformed IPv6 normalization
来源: CVE Program / CVE List V5
Vulnerability Description
fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not validate the complete IPv6 grammar, so invalid trailing text in an authority can be silently discarded and a malformed attacker-controlled host is turned into a different valid IPv6 destination. For example, a bracketed literal with invalid trailing characters is normalized to the unspecified address, which a Node HTTP client then connects to a local service over loopback, and other malformed literals collapse to private-range addresses. No error is set on the parsed result, so an application checking the error field cannot detect the rewrite. An application that normalizes untrusted URLs before outbound requests, redirects, proxy routing, or address-policy enforcement can be redirected to a local or private IPv6 target, giving a server-side request forgery and address-policy bypass primitive. The affected versions are 2.3.1 up to but not including 2.4.5, 3.0.0 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which validate bracketed IP literals against the full grammar and mark malformed literals as authority errors. Users should upgrade to a patched version.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A: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
二、漏洞 CVE-2026-75975 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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高级
Qwen3.6-35B-A3B
· 5309 chars
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三、漏洞 CVE-2026-75975 的情报信息
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CVE-2026-75975 厂商安全公告 (1)
同批安全公告 · fast-uri · 2026-08-24 · 共 4 条
| CVE-2026-75899 | 7.5 HIGH | fast-uri 服务器端请求伪造漏洞 |
| CVE-2026-75931 | 7.5 HIGH | fast-uri IDN规范化跳过导致主机混淆漏洞 |
| CVE-2026-76172 | 7.5 HIGH | fast-uri 主机混淆漏洞（百分编码方案标准化） |
IV. Related Vulnerabilities
V. Comments for CVE-2026-75975
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