{"id":"EUVD-2026-107417","revision":null,"records":[{"revision":"dd867da3d9714393a4617a677c94039d","observedAt":"2026-10-28T18:46:48.818+00:00","statement":{"source":"cve-program","id":"CVE-2026-114133","aliases":[],"title":"Nuxt server islands render `useHeadSafe` input without sanitisation","description":"Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input into the page head as an ordinary entry. An application that passes attacker-controlled data to useHeadSafe in a .server.vue component or page, or in a component rendered through NuxtIsland, can therefore render values normally removed by the allowlist, including event-handler attributes or executable script content, resulting in stored cross-site scripting in the application origin. This issue is fixed in version 4.6.2 .","state":0,"publishedAt":"2026-10-21T17:52:09.381+00:00","modifiedAt":"2026-10-28T17:23:40.538+00:00","affected":[{"ecosystem":"Vendor product","name":"nuxt","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nuxt\",\n                    \"product\": \"nuxt\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.13.0, < 4.6.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x","https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0","https://github.com/nuxt/nuxt/releases/tag/v4.6.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114133","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114133","identifiers":["CVE-2026-114133"]},"retained":false,"historicalAffected":[]},{"revision":"e089e0fb19404304854aeecdce8109ac","observedAt":"2026-11-07T04:35:52.58+00:00","statement":{"source":"euvd","id":"EUVD-2026-107417","aliases":["CVE-2026-114133","GHSA-xfq5-w38q-pc2x"],"title":"Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later …","description":"Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input into the page head as an ordinary entry. An application that passes attacker-controlled data to useHeadSafe in a .server.vue component or page, or in a component rendered through NuxtIsland, can therefore render values normally removed by the allowlist, including event-handler attributes or executable script content, resulting in stored cross-site scripting in the application origin. This issue is fixed in version 4.6.2 .","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":null}],"references":["https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x","https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0","https://github.com/nuxt/nuxt/releases/tag/v4.6.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-107417","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 21, 2026, 5:52:09 PM","dateUpdated":"Oct 28, 2026, 5:23:40 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-107417","identifiers":["EUVD-2026-107417","CVE-2026-114133","GHSA-xfq5-w38q-pc2x"]},"retained":false,"historicalAffected":[]},{"revision":"7edb027aef23405e9e63f9ef7e60a70f","observedAt":"2026-10-29T06:48:04.607+00:00","statement":{"source":"nvd","id":"CVE-2026-114133","aliases":[],"title":"Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later …","description":"Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input into the page head as an ordinary entry. An application that passes attacker-controlled data to useHeadSafe in a .server.vue component or page, or in a component rendered through NuxtIsland, can therefore render values normally removed by the allowlist, including event-handler attributes or executable script content, resulting in stored cross-site scripting in the application origin. This issue is fixed in version 4.6.2 .","state":0,"publishedAt":"2026-10-21T18:17:26.26+00:00","modifiedAt":"2026-10-28T18:17:10.55+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0","https://github.com/nuxt/nuxt/releases/tag/v4.6.2","https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-114133","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-79"],"productCriteria":[],"sourceDates":{"published":"2026-10-21T18:17:26.260","lastModified":"2026-10-28T18:17:10.550"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-114133","identifiers":["CVE-2026-114133"]},"retained":false,"historicalAffected":[]},{"revision":"02acf49f73b64cfe96a78900981f0905","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-xfq5-w38q-pc2x","aliases":["CVE-2026-114133"],"title":"Nuxt server islands render `useHeadSafe` input without sanitisation","description":"## Impact\n\n`useHeadSafe` restricts head input to an allowlist of safe tags and attributes. For example, `bodyAttrs` is limited to `class` and `style`, event handler attributes are removed, and `<script>` tags are only kept for JSON types.\n\nWhen `useHeadSafe` is called inside a server island (a `.server.vue` component or page, or a component rendered with `<NuxtIsland>`), the island renderer serialises the raw input of every head entry into the island response without the option that marks it as safe input. `<NuxtIsland>` then pushes that input into the page's head as a regular entry, both during server rendering and when hydrating or refetching on the client.\n\nAs a result, input that `useHeadSafe` would normally strip (such as `bodyAttrs.onload` or executable `<script>` content) is rendered into the page. If an application passes user-controlled data to `useHeadSafe` inside a server island, an attacker who controls that data can achieve stored cross-site scripting on the application's origin.\n\n```vue\n<!-- components/AuthorMeta.server.vue -->\n<script setup lang=\"ts\">\nconst { data: author } = await useFetch('/api/author')\n// author.value.head is user-authored, e.g. { bodyAttrs: { onload: '...' } }\nuseHeadSafe(author.value.head)\n</script>\n```\n\n## Mitigating factors\n\n- Server components are experimental. They are only active when the application defines a `.server.vue` component or page, or enables `experimental.componentIslands` and renders `<NuxtIsland>`.\n- Exploitation requires the application to pass attacker-controlled data to `useHeadSafe` inside a server island. `useHeadSafe` called from regular (non-island) components and pages is not affected.\n\n## Affected versions\n\n`nuxt` `>=3.13.0`, when head support for server islands was introduced. Nuxt 2 is not affected.\n\n## Patches\n\nFixed in `nuxt@4.6.2`. Nuxt 3 reached end of life on 31 July 2026 and will not receive a fix.\n\nPatched releases apply Unhead's safe input filtering to `useHeadSafe` entries on the server before they are added to the island response, so `islandResponse.head` (including what `render:island` hooks see) only contains input that `useHeadSafe` allows.\n\n## Workarounds\n\nUpgrade to `nuxt@4.6.2`. If you cannot upgrade, including on Nuxt 3:\n\n1. Call `useHeadSafe` with untrusted input from a regular component or page rather than from inside a server island.\n2. Alternatively, validate untrusted head input against your own allowlist before passing it to `useHeadSafe` inside a server island.","state":0,"publishedAt":"2026-10-22T16:58:00+00:00","modifiedAt":"2026-10-22T17:15:04.2919342+00:00","affected":[{"ecosystem":"npm","name":"nuxt","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.13.0"},{"kind":"fixed","version":"4.6.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x","https://nvd.nist.gov/vuln/detail/CVE-2026-114133","https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0","https://github.com/nuxt/nuxt","https://github.com/nuxt/nuxt/releases/tag/v4.6.2"],"sourceUrl":"https://github.com/advisories/GHSA-xfq5-w38q-pc2x","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xfq5-w38q-pc2x","identifiers":["GHSA-xfq5-w38q-pc2x","CVE-2026-114133"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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