CVE-2026-39976
7.1 · HIGHOverview
CVE-2026-39976 is a high-severity vulnerability affecting laravel passport. It was published on April 9, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from laravel. Update passport to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| laravel | passport | >= 13.0.0, < 13.7.1 | Affected |
References
Frequently Asked Questions
What is CVE-2026-39976?
CVE-2026-39976 is a high-severity vulnerability affecting laravel passport. It was published on April 9, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2026-39976?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-39976?
Check the references section for vendor advisories and patches from laravel. Update passport to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-39976?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-39976 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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