Hono's IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-24398 · CVE overview and exploitation status

EUVD-2026-4774

GHSA-r354-f388-2fhh

cve-program · CVE-2026-24398

• https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh
• https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37
• https://github.com/honojs/hono/releases/tag/v4.11.7

euvd · EUVD-2026-4774

• https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh
• https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37
• https://github.com/honojs/hono/releases/tag/v4.11.7

nvd · CVE-2026-24398

• https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37
• https://github.com/honojs/hono/releases/tag/v4.11.7
• https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh

osv · GHSA-r354-f388-2fhh

• https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh
• https://nvd.nist.gov/vuln/detail/CVE-2026-24398
• https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37
• https://github.com/honojs/hono
• https://github.com/honojs/hono/releases/tag/v4.11.7

• 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 `convertIPv4ToBi… · Advisory content revised · 15 Nov 2026