{
  "schema_version": "1.4.0",
  "id": "GHSA-f82v-jwr5-mffw",
  "modified": "2025-09-10T21:13:17Z",
  "published": "2025-03-21T15:20:12Z",
  "aliases": [
    "CVE-2025-29927"
  ],
  "summary": "Authorization Bypass in Next.js Middleware",
  "details": "# Impact\nIt is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware.\n\n# Patches\n* For Next.js 15.x, this issue is fixed in `15.2.3`\n* For Next.js 14.x, this issue is fixed in `14.2.25`\n* For Next.js 13.x, this issue is fixed in `13.5.9`\n* For Next.js 12.x, this issue is fixed in `12.3.5`\n* For Next.js 11.x, consult the below workaround.\n\n_Note: Next.js deployments hosted on Vercel are automatically protected against this vulnerability._\n\n# Workaround\nIf patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the `x-middleware-subrequest` header from reaching your Next.js application.\n\n## Credits\n\n- Allam Rachid (zhero;)\n- Allam Yasser (inzo_)",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "13.0.0"
            },
            {
              "fixed": "13.5.9"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "14.0.0"
            },
            {
              "fixed": "14.2.25"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "15.0.0"
            },
            {
              "fixed": "15.2.3"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "11.1.4"
            },
            {
              "fixed": "12.3.5"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29927"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vercel/next.js"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/releases/tag/v12.3.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/releases/tag/v13.5.9"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20250328-0002"
    },
    {
      "type": "WEB",
      "url": "https://vercel.com/changelog/vercel-firewall-proactively-protects-against-vulnerability-with-middleware"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/03/23/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/03/23/4"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285",
      "CWE-863"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-21T15:20:12Z",
    "nvd_published_at": "2025-03-21T15:15:42Z"
  }
}