Nuxt server islands render `useHeadSafe` input without sanitisation

{
  "id": "ff22ee3cecef7ce8b3553553145985ecab90857277cf19c10390c03b671cffb4",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-114133",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nuxt server islands render `useHeadSafe` input without sanitisation",
    "summary": "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 .",
    "evidence": "cve:CVE-2026-114133",
    "products": [
      {
        "name": {
          "value": "nuxt",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-114133",
      "aliases": [
        "CVE-2026-114133"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "CHANGED",
            "version": "3.1",
            "baseScore": 5.4,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "integrityImpact": "LOW",
            "userInteraction": "REQUIRED",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "LOW"
          }
        }
      ],
      "affected": [
        {
          "vendor": "nuxt",
          "product": "nuxt",
          "versions": [
            {
              "status": "affected",
              "version": ">= 3.13.0, < 4.6.2"
            }
          ]
        }
      ],
      "modified": "2026-10-28T17:23:40.538Z",
      "provider": "cve",
      "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"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-114133",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T17:23:04.358929Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-28T17:23:40.538Z"
            }
          }
        ],
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-21T17:53:26.503Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-114133",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 466468,
  "published_at": "2026-10-21T17:52:09.381+00:00"
}