# CVE-2026-24398

## Summary

- **CVE ID:** CVE-2026-24398
- **Severity:** MEDIUM
- **CVSS Score:** 4.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-185
- **Published:** Jan 27, 2026
- **Last Modified:** Mar 12, 2026

## Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The `IPV4_REGEX` pattern and `convertIPv4ToBinary` function in `src/utils/ipaddr.ts` do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls. Version 4.11.7 contains a patch for the issue.

## Affected Products

- honojs — hono (< 4.11.7)

## References

- [CNA](https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh)
- [CNA](https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37)
- [CNA](https://github.com/honojs/hono/releases/tag/v4.11.7)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 24.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._