CVE-2026-24398: Hono

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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

• Hono Hono: before 4.11.7 (fixed in 4.11.7)

Published 2026-01-27. Last modified 2026-06-17.