CVE-2026-39976
High · 7.1CVSS
7.1
EPSS
0.4%
Published
Apr 9, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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