CVE-2026-47674

{"id": "CVE-2026-47674", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2026-05-28T17:16:32.383", "references": [{"url": "https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-185"}, {"lang": "en", "value": "CWE-1289"}]}], "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 \u2014 such as compressed forms, explicit-zero forms, or hex-notation IPv4-mapped addresses \u2014 do not match the normalized rule entry, causing the rule to be silently skipped. This vulnerability is fixed in 4.12.21."}], "lastModified": "2026-05-29T16:57:58.913", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "797B2A25-4B24-46A9-8EF4-35F6F1214A7C", "versionEndExcluding": "4.12.21"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}