{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:laravel:passport:*:*:*:*:*:laravel:*:*",
            "extracted_events": [
              {
                "introduced": "13.0.0"
              },
              {
                "fixed": "13.7.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "1d89db335f9b6628f5ebeca8b64e3f7cbd89ec8b"
            },
            {
              "fixed": "ca14d978801d328dc5b425af37781db9fcbace8c"
            }
          ],
          "repo": "https://github.com/laravel/passport",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-349c-2h2f-mxf6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39976.json"
  },
  "details": "Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for client_credentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier (since there's no user). The token guard then passes this value to retrieveById() without validating it's actually a user identifier, potentially resolving an unrelated real user. Any machine-to-machine token can inadvertently authenticate as an actual user. This vulnerability is fixed in 13.7.1.",
  "id": "CVE-2026-39976",
  "modified": "2026-07-08T05:36:16.575712086Z",
  "published": "2026-04-09T16:50:42.326Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39976.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/laravel/passport/security/advisories/GHSA-349c-2h2f-mxf6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39976"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/laravel/passport/issues/1900"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/thephpleague/oauth2-server/issues/1456#issuecomment-2734989996"
    },
    {
      "type": "FIX",
      "url": "https://github.com/laravel/passport/pull/1901"
    },
    {
      "type": "FIX",
      "url": "https://github.com/laravel/passport/pull/1902"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Laravel Passport's TokenGuard Authenticates Unrelated User for Client Credentials Tokens"
}