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CVE-2026-39976

7.1 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 4

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.1 · laravelNVD modified 2026-10-26 21:10

Affected (CPE criteria) 1

  • cpe:2.3:a:laravel:passport:*:*:*:*:*:laravel:*:*

References 5