Hono’s IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing_CVE-2026-24398

{
    "lastseen": "",
    "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.",
    "published": "2026-01-27T19:06:42.792Z",
    "modified": "2026-01-27T19:20:35.594Z",
    "type": "cve",
    "title": "Hono's IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing",
    "source": "GitHub_M",
    "references": "https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh\nhttps://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37\nhttps://github.com/honojs/hono/releases/tag/v4.11.7",
    "id": "CVE-2026-24398",
    "bulletinFamily": "",
    "cwe": [
        "CWE-185"
    ],
    "cvelist": null,
    "sourceData": "honojs hono < 4.11.7",
    "sourceHref": "",
    "cvss": {
        "score": 4.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "hono",
    "version": "< 4.11.7",
    "vendor": "honojs",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}