Medium 5.3Published Jul 8, 2026

CVE-2026-59897Hono is a Web application framework that provides support for any JavaScript runtime.

Updated under an hour ago (2026-10-19 07:10 UTC)

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Every CVE for hono

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-348
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

hono hono hono:hono	from 4.3.3 before 4.12.27	NVD

References

https://github.com/honojs/hono/commit/aa921770d09bc35970362d5a2630a878f6d982fdpatch
https://github.com/honojs/hono/releases/tag/v4.12.27release-notes
https://github.com/honojs/hono/security/advisories/GHSA-xgm2-5f3f-mvvcvendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.