CVE-2026-47674
CVE-2026-47674 · Hono: IP Restriction bypasses static deny rules for non-canonical IPv6
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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.
CVSS 5.3 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node