CVE-2026-39409
MEDIUMHono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses
Title source: cnaDescription
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.
References (3)
Scores
CVSS v3
5.3
EPSS
0.0001
EPSS Percentile
1.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-180
Status
published
Products (3)
hono/hono
< 4.12.11
honojs/hono
< 4.12.12
npm/hono
0 - 4.12.12npm
Published
Apr 08, 2026
Tracked Since
Apr 08, 2026