CVE-2026-24398
Hono's IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing
- State
- Published
- Severity
- 4.8 Medium
- Published
- Jan 27, 2026
- Updated
- Jan 27, 2026
- Reserved
- Jan 22, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-185 Incorrect Regular Expression
Affected Products
| Product | Versions |
|---|---|
honohonojs |
|
References
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