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CVE-2026-59897

MEDIUM
4.8
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-59897
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-07 16:40 UTC
Published
2026-07-08 16:06 UTC
Last updated
2026-07-08 16:06 UTC
Primary CWE
CWE-348
CWE-348: Use of Less Trusted Source
Vendor / Product
honojs / hono
Sources
cve.org  ·  NVD

Severity & Metrics

4.8 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products (1)
VendorProductPlatformVersions
honojs hono — >= 4.3.3, < 4.12.27
Weakness (CWE)
CWESourceDescription
CWE-348 cna CWE-348: Use of Less Trusted Source
CVSS scores (1)
ScoreSeverityVersionSourceVector
4.8 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
References (3)
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