Nuxt: Route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher_CVE-2026-53721

{
    "lastseen": "",
    "description": "Nuxt is an open-source web development framework for Vue.js. From versions 3.11.0 to before 3.21.7 and 4.0.0 to before 4.4.7, there is a route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher. This issue has been patched in versions 3.21.7 and 4.4.7.",
    "published": "2026-06-12T13:41:34.022Z",
    "modified": "2026-06-12T13:41:34.022Z",
    "type": "cve",
    "title": "Nuxt: Route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher",
    "source": "GitHub_M",
    "references": "https://github.com/nuxt/nuxt/security/advisories/GHSA-mm7m-92g8-7m47\nhttps://github.com/nuxt/nuxt/commit/07e39cd6f26e407b4192b7865bd17bc44536b9bb\nhttps://github.com/nuxt/nuxt/commit/3f3e3fa7b5eec8e495f4f8ce0a54813a8875a11e",
    "id": "CVE-2026-53721",
    "bulletinFamily": "",
    "cwe": [
        "CWE-178",
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "nuxt nuxt >= 3.11.0, < 3.21.7\nnuxt nuxt >= 4.0.0, < 4.4.7",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "nuxt",
    "version": ">= 3.11.0, < 3.21.7",
    "vendor": "nuxt",
    "ai_description": "Route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher",
    "ai_severity": "High",
    "ai_vendor": "Nuxt",
    "ai_product": "Nuxt",
    "ai_version": "3.11.0-3.21.7, 4.0.0-4.4.7",
    "ai_score": 8.8
}