CVE-2026-47674

MEDIUM EPSS 15.5%
Published May 28, 20261mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
15.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-1289
CWE-185

Affected Products 1

VendorProductVersionRange
honohono* <4.12.21

References 1

  • github.com https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.