{"id":"CVE-2026-47674","sourceIdentifier":"security-advisories@github.com","published":"2026-05-28T17:16:32.383","lastModified":"2026-10-14T20:10:00.190","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the ip-restriction middleware (hono/ip-restriction) compares incoming IP addresses against configured deny and allow rules using string equality after partial normalization. Non-canonical IPv6 representations of an address already listed in a static rule — such as compressed forms, explicit-zero forms, or hex-notation IPv4-mapped addresses — do not match the normalized rule entry, causing the rule to be silently skipped. This vulnerability is fixed in 4.12.21."},{"lang":"es","value":"Hono es un framework de aplicación web que proporciona soporte para cualquier entorno de ejecución de JavaScript. Anteriormente a la 4.12.21, el middleware de restricción de IP (hono/ip-restriction) compara las direcciones IP entrantes con las reglas de denegación y permiso configuradas utilizando la igualdad de cadenas después de una normalización parcial. Representaciones IPv6 no canónicas de una dirección ya listada en una regla estática - como formas comprimidas, formas de ceros explícitos o direcciones mapeadas a IPv4 en notación hexadecimal - no coinciden con la entrada de regla normalizada, lo que provoca que la regla se omita silenciosamente. Esta vulnerabilidad se corrigió en la 4.12.21."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"honojs","product":"hono","versions":[{"version":"< 4.12.21","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-02T18:14:51.645201Z","id":"CVE-2026-47674","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-185"},{"lang":"en","value":"CWE-1289"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*","versionEndExcluding":"4.12.21","matchCriteriaId":"797B2A25-4B24-46A9-8EF4-35F6F1214A7C"}]}]}],"references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}