CVE-2026-54289— Hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest

Hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so every value overwrites the previous one and only the last reaches the application. Repeated request headers such as X-Forwarded-For, Forwarded, and Via are silently truncated to a single value. Request middleware sees only the last value of a repeated header instead of the full chain. For applications that base access control on the X-Forwarded-For chain, this can weaken or alter that decision; for auditing, hop history is lost. This vulnerability is fixed in 4.12.25.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

使用不可信的源

honojs hono 信任管理问题漏洞

honojs hono是honojs的Web服务器。 honojs hono 4.12.25之前版本存在信任管理问题漏洞，该漏洞源于信任管理问题，可能导致重复请求标头被截断至单一值，从而削弱或改变访问控制决策。

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