{"id":"CVE-2026-47674","revision":"a97cb6cadecd4f6b88c1c9c5873f06e7","records":[{"revision":"a97cb6cadecd4f6b88c1c9c5873f06e7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-47674","aliases":[],"title":"Hono: IP Restriction bypasses static deny rules for non-canonical IPv6","description":"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.","state":0,"publishedAt":"2026-05-28T15:29:08.525+00:00","modifiedAt":"2026-06-02T18:15:02.284+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.12.21\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-47674","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-47674","identifiers":["CVE-2026-47674"]},"retained":false,"historicalAffected":[]}],"coverage":[]}