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 `

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

References

• https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37(Patch)
• https://github.com/honojs/hono/releases/tag/v4.11.7(Release Notes)
• https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh(Vendor Advisory)