{"id":"CVE-2026-47674","title":"Hono is a Web application framework that provides support for any JavaScript runtime","summary":"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 stri…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-185","CWE-1289"],"vendor":"hono","product":"hono","affected":["hono < 4.12.21"],"patched":["hono 4.12.21"],"published":"2026-05-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-47674","references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.0031,"epssPercentile":0.22228,"ingestedAt":"2026-10-14T20:53:12.340Z","slug":"CVE-2026-47674","body":"## Overview\n\nHono 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.\n\n## Affected\n\n- `hono < 4.12.21`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `hono 4.12.21`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}