{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.4.0-beta.18"
                  },
                  {
                    "fixed": "1.7.7"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "ac54bfd67821a7607533af2059858b12bc54e26a"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v1.7.7",
                "range": [
                  {
                    "fixed": "db02f233918ad1233bf0753e437e1c0da353273d"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "04c0c10472ae2f287da0c352e719fa22ca49e674"
            },
            {
              "fixed": "db02f233918ad1233bf0753e437e1c0da353273d"
            },
            {
              "fixed": "ac54bfd67821a7607533af2059858b12bc54e26a"
            }
          ],
          "repo": "https://github.com/better-auth/better-auth",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-965c-763c-88jm"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114607.json"
  },
  "details": "Better Auth is an authentication and authorization library for TypeScript. From 1.4.0-beta.18 until 1.7.7, deployments that enable Magic Link with storeToken set to plain, or with storeToken set to hashed and the global verification.storeIdentifier setting also set to hashed, enable a built-in social or Generic OAuth provider, and use account.storeStateStrategy set to database can accept an OAuth sign-in state value as a Magic Link token. These settings can cause Magic Link verification records and OAuth state to resolve to the same stored identifier, allowing an unauthenticated attacker to start OAuth sign-in for a known email address and redeem the returned state through Magic Link without controlling the mailbox or completing the provider callback. The attacker can obtain a normal session for an existing user, or create an account incorrectly marked as email verified when sign-up is enabled. This issue is fixed in version 1.7.7.",
  "id": "CVE-2026-114607",
  "modified": "2026-10-24T02:30:50.012261458Z",
  "published": "2026-10-22T16:47:27.480Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114607.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114607"
    },
    {
      "type": "FIX",
      "url": "https://github.com/better-auth/better-auth/commit/ac54bfd67821a7607533af2059858b12bc54e26a"
    },
    {
      "type": "FIX",
      "url": "https://github.com/better-auth/better-auth/pull/11494"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "better-auth: OAuth state can be used as a Magic Link to sign in as another user"
}