{"id":"CVE-2026-59897","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-59897","generatedAt":"2026-10-28T08:10:52.851Z","title":"Hono is a Web application framework that provides support for any JavaScript runtime.","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.","published":"2026-07-08T17:17:28.000Z","lastModified":"2026-10-25T17:10:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-348"],"affected":["hono/hono"],"epss":{"score":0.0018,"percentile":0.07472,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/honojs/hono/commit/aa921770d09bc35970362d5a2630a878f6d982fd","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/honojs/hono/releases/tag/v4.12.27","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/honojs/hono/security/advisories/GHSA-xgm2-5f3f-mvvc","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-59897","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}