{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "14.3.0-canary.77"
            },
            {
              "fixed": "15.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.1.0-canary.0"
            },
            {
              "fixed": "15.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.2.0-canary.0"
            },
            {
              "fixed": "15.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.3.0-canary.0"
            },
            {
              "fixed": "15.3.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.4.0-canary.0"
            },
            {
              "fixed": "15.4.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.5.0-canary.0"
            },
            {
              "fixed": "15.5.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "16.0.0-canary.0"
            },
            {
              "fixed": "16.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66478"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-03T19:07:11Z",
    "nvd_published_at": "2025-12-03T18:15:47Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability affects certain React packages\u003csup\u003e1\u003c/sup\u003e for versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 and frameworks that use the affected packages, including Next.js 15.x and 16.x using the App Router. The issue is tracked upstream as [CVE-2025-55182](https://www.cve.org/CVERecord?id=CVE-2025-55182). \n\nFixed in:\nReact: 19.0.1, 19.1.2, 19.2.1\nNext.js: 15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7\n\nThe vulnerability also affects experimental canary releases starting with 14.3.0-canary.77. Users on any of the 14.3 canary builds should either downgrade to a 14.x stable release or 14.3.0-canary.76.\n\nAll users of stable 15.x or 16.x Next.js versions should upgrade to a patched, stable version immediately.\n\n\u003csup\u003e1\u003c/sup\u003e The affected React packages are:\n- react-server-dom-parcel\n- react-server-dom-turbopack\n- react-server-dom-webpack",
  "id": "GHSA-9qr9-h5gf-34mp",
  "modified": "2025-12-04T20:07:06Z",
  "published": "2025-12-03T19:07:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-9qr9-h5gf-34mp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66478"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vercel/next.js"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Next.js is vulnerable to RCE in React flight protocol"
}