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Vulnerabilities CVE-2026-47674

CVE-2026-47674

Medium
Open
TLP:CLEAR

Hono: IP Restriction bypasses static deny rules for non-canonical IPv6

NVD CVE.org
Critical Infrastructure

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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.

Details

CVSS Score
5.3
EPSS Score
0.24%

15.6th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Confidence
90%
Published
May 28, 2026
Last Modified
May 28, 2026
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