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CVE-2026-59897 (GCVE-0-2026-59897)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:06 – Updated: 2026-07-09 13:51
VLAI
Title
Hono: API Gateway v1 adapter can drop a distinct repeated request header value during de-duplication
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.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:51 UTC
CWE
  • CWE-348 - Use of Less Trusted Source
Assigner
References
Impacted products
Vendor Product Version CPE status
honojs hono Affected: >= 4.3.3, < 4.12.27
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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