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5.3 Medium

CVE-2026-47674 Hono is a Web application framework that provides support for any JavaScript runtime

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.

Affected products and versions

Product Affected versions Fixed in
hono 4.12 earliest → < 4.12.21 4.12.21
The 48 CVEs of hono →
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