VULNERABILITY INTELLIGENCE
CVE-2026-39976
CVSS score7.1 HIGH
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-04-09
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
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.
Weakness classification
- security-advisories@github.com: CWE-287
Primary references
- security-advisories@github.com — Exploit, Issue Tracking
- security-advisories@github.com — Issue Tracking, Patch
- security-advisories@github.com — Issue Tracking, Patch
- security-advisories@github.com — Mitigation, Vendor Advisory
- security-advisories@github.com — Issue Tracking, Patch