CVEvulnerability
CVE-2026-39976
7.1 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-09
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
- Weaknesses
- CWE-287
Description
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.
Affected configurations
• laravel passport (>= 13.0.0 < 13.7.1)
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- https://github.com/laravel/passport/issues/1900 Exploit, Issue Tracking
- https://github.com/laravel/passport/pull/1901 Issue Tracking, Patch
- https://github.com/laravel/passport/pull/1902 Issue Tracking, Patch
- https://github.com/laravel/passport/security/advisories/GHSA-349c-2h2f-mxf6 Mitigation, Vendor Advisory
- https://github.com/thephpleague/oauth2-server/issues/1456#issuecomment-2734989996 Issue Tracking, Patch