Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter ("hono/aws-lambda") behind an Application Load Balancer (ALB), the "getConnInfo()" function incorrectly selected the first value from the "X-Forwarded-For" header. Because AWS ALB appends the real client IP address to the end of the "X-Forwarded-For" header, the first value can be attacker-controlled. This could allow IP-based access control mechanisms (such as the "ipRestriction" middleware) to be bypassed. Version 4.12.2 patches the issue.