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.
History

Mon, 02 Mar 2026 16:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

Fri, 27 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 26 Feb 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Hono
Hono hono
Vendors & Products Hono
Hono hono

Wed, 25 Feb 2026 15:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo
Weaknesses CWE-290
CWE-345
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-25T15:01:44.681Z

Updated: 2026-02-27T17:01:28.403Z

Reserved: 2026-02-23T17:56:51.202Z

Link: CVE-2026-27700

cve-icon Vulnrichment

Updated: 2026-02-27T17:01:23.329Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-25T16:23:26.440

Modified: 2026-03-02T16:17:53.100

Link: CVE-2026-27700

cve-icon Redhat

No data.