CVE-2026-59897
4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. From 4.3.3 before 4.12.27, the AWS API Gateway v1 adapter can drop a distinct repeated request header value because it de-duplicates values using a substring comparison instead of an exact match, so middleware or application logic that depends on the complete X-Forwarded-For chain, rate limiting, audit logging, or proxy-chain validation can receive incomplete data. This issue is fixed in version 4.12.27.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| honojs | hono | >= 4.3.3, < 4.12.27 | affected |
Weaknesses
- CWE-348: CWE-348: Use of Less Trusted Source
References
- https://github.com/honojs/hono/security/advisories/GHSA-xgm2-5f3f-mvvc
- https://github.com/honojs/hono/commit/aa921770d09bc35970362d5a2630a878f6d982fd
- https://github.com/honojs/hono/releases/tag/v4.12.27
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