CVE-2026-39976
- Source
- https://cve.org/CVERecord?id=CVE-2026-39976
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39976.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-39976
- Aliases
- Published
- 2026-04-09T16:50:42Z
- Modified
- 2026-10-28T02:30:22Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N CVSS Calculator
- Summary
- Laravel Passport's TokenGuard Authenticates Unrelated User for Client Credentials Tokens
- 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.
- 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" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39976.json
- https://github.com/laravel/passport/security/advisories/GHSA-349c-2h2f-mxf6
- https://nvd.nist.gov/vuln/detail/CVE-2026-39976
- https://github.com/laravel/passport/issues/1900
- https://github.com/thephpleague/oauth2-server/issues/1456#issuecomment-2734989996
- https://github.com/laravel/passport/pull/1901
- https://github.com/laravel/passport/pull/1902
Affected packages
Git / github.com/laravel/passport
Affected ranges
- Type
- GIT
- Repo
- https://github.com/laravel/passport
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "13.0.0" }, { "fixed": "13.7.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "cpe": "cpe:2.3:a:laravel:passport:*:*:*:*:*:laravel:*:*", "range": [ { "introduced": "13.0.0" }, { "fixed": "13.7.1" } ], "source": "CPE_RANGE" } ] }