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.
Problem types
CWE-185: Incorrect Regular Expression
CWE-1289: Improper Validation of Unsafe Equivalence in Input
Product status
References
github.com/...s/hono/security/advisories/GHSA-xrhx-7g5j-rcj5