{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@better-auth/passkey"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-25T21:42:53Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "# Summary\n\nAffected versions of the better-auth passkey plugin allow users with any valid session to delete arbitrary passkeys via their ID using `POST /passkey/delete-passkey`.\n\n# Details\n\n`ctx.body.id` is implicitly trusted and used in passkey deletion queries.\n\nbetter-auth applications configured with `useNumberId` may use auto incrementing IDs which makes it trivial to delete all passkeys via enumeration.",
  "id": "GHSA-4vcf-q4xf-f48m",
  "modified": "2025-11-25T21:42:53Z",
  "published": "2025-11-25T21:42:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-4vcf-q4xf-f48m"
    },
    {
      "type": "WEB",
      "url": "https://github.com/better-auth/better-auth/commit/06d68239e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/better-auth/better-auth"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Better Auth Passkey Plugin allows passkey deletion through IDOR"
}