CVE-2026-117549— fastify/secure-session 签名验证绕过漏洞
一分钟漏洞结论
影响对象
@fastify/secure-session @fastify/secure-session
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/secure-session 是 Fastify 的一个会话插件，它将加密后的会话数据存储在 Cookie 中。在 7.5.0 至 8.4.1 版本中，当插件配置为使用“签名 Cookie"选项时，会调用 Cookie 的签名验证（unsign）流程；然而，即使签名检查报告值为无效，插件仍会将原始 Cookie 值传递给会话解密器，导致签名未通过验证的会话依然被解密。 该问题的实际影响在于：当应用程序独立提供 Cookie 签名密钥与会话加密密钥，并仅轮换签名密钥以废弃现有会话（同时保持加密密钥有
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一、 漏洞 CVE-2026-117549 基础信息
漏洞信息
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Vulnerability Title
@fastify/secure-session vulnerable to signature verification bypass via cookie signature removal
来源: CVE Program / CVE List V5
Vulnerability Description
@fastify/secure-session is a session plugin for Fastify that stores an encrypted session in a cookie. In versions 7.5.0 through 8.4.1, when the plugin is configured with the signed cookie option, it calls the cookie unsign routine but, when the signature check reports the value as invalid, still passes the original cookie value to the session decoder, so a session whose signature did not validate is decrypted anyway. The practical effect appears when an application supplies the cookie signing secret independently of the session encryption key and rotates only the signing secret to retire existing sessions while keeping the encryption key active, because a holder of an old session cookie can strip the now obsolete signature and keep using the session. The attacker must already possess an unexpired encrypted session cookie and needs neither secret, and cannot forge session data, extend expiry, or survive rotation of the encryption key. The issue is fixed in @fastify/secure-session 8.4.2, which no longer decodes the session when the signed cookie option is set and the signature check fails, and users should upgrade to 8.4.2 or later. As a workaround, rotate the session encryption key rather than relying on rotation of the cookie signing secret alone.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| @fastify/secure-session | @fastify/secure-session | 7.5.0 ~ 8.4.2 | - |
|
二、漏洞 CVE-2026-117549 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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