Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning_CVE-2026-46342

{
    "lastseen": "",
    "description": "Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, the /__nuxt_island/* endpoint accepts attacker-controlled props query/body parameters and renders any island component without verifying that the URL-resident hash (<Name>_<hashId>.json) was actually issued for those inputs by <NuxtIsland>. The hash is computed and embedded client-side but never validated server-side, so the same path can return materially different responses depending on the query. This issue has been patched in versions 3.21.6 and 4.4.6.",
    "published": "2026-06-12T12:50:41.589Z",
    "modified": "2026-06-12T12:52:25.187Z",
    "type": "cve",
    "title": "Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning",
    "source": "GitHub_M",
    "references": "https://github.com/nuxt/nuxt/security/advisories/GHSA-g8wj-3cr3-6w7v\nhttps://github.com/nuxt/nuxt/pull/35077",
    "id": "CVE-2026-46342",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79",
        "CWE-349",
        "CWE-444"
    ],
    "cvelist": null,
    "sourceData": "nuxt nuxt >= 3.1.0, < 3.21.6\nnuxt nuxt >= 4.0.0-alpha.1, < 4.4.6",
    "sourceHref": "",
    "cvss": {
        "score": 2.3,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "nuxt",
    "version": ">= 3.1.0, < 3.21.6",
    "vendor": "nuxt",
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}