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.
Metrics
Affected Vendors & Products
References
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
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Thu, 26 Feb 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Hono
Hono hono |
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| 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 |
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| References |
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| Metrics |
cvssV3_1
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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
Updated: 2026-02-27T17:01:23.329Z
Status : Analyzed
Published: 2026-02-25T16:23:26.440
Modified: 2026-03-02T16:17:53.100
Link: CVE-2026-27700
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