CVE-2026-41427
6.5 · MEDIUMOverview
CVE-2026-41427 is a medium-severity vulnerability affecting better-auth better-auth\/oauth-provider. It was published on April 24, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client creation endpoints did not invoke the hook before persisting new clients. Deployments that configured clientPrivileges to restrict client registration were not actually restricted — any authenticated user could reach the create endpoints and register an OAuth client with attacker-chosen redirect URIs and metadata. This vulnerability is fixed in 1.6.5.
Remediation
Check the references section for vendor advisories and patches from better-auth. Update better-auth\/oauth-provider 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 |
|---|---|---|---|
| better-auth | better-auth\/oauth-provider | >= 1.4.9, < 1.6.5 | Affected |
Frequently Asked Questions
What is CVE-2026-41427?
CVE-2026-41427 is a medium-severity vulnerability affecting better-auth better-auth\/oauth-provider. It was published on April 24, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2026-41427?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-41427?
Check the references section for vendor advisories and patches from better-auth. Update better-auth\/oauth-provider 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-2026-41427?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-41427 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
AI agents map your attack surface to find vulnerabilities like this one.
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