CVE-2026-54289

CVE-2026-54289 — Hono Lambda@Edge header handling : On AWS Lambda@Edge, prior to 4.12.25, CloudFront may deliver repeated headers as multiple entries. The Hono Lambda@Edge adapter uses Headers.set for each value, overwriting the previous one, so only the last value reaches the application. Header...

Improperly Implemented Security Check for Standard

Overview hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Improperly Implemented Security Check for Standard in the Lambda@Edge adapter that truncates repeated request headers. An attacker can bypass access restrictions or affect auditing...

GHSA-WGPF-JWQJ-8H8P hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest

Summary 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 reques...