Incorrect Authorization Affecting @better-auth/oauth-provider package, versions >=1.4.8-beta.7 <1.6.5>=1.7.0-beta.0 <1.7.0-beta.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published17 Apr 2026
- disclosed16 Apr 2026
- creditDaniel Müller
Introduced: 16 Apr 2026
CVE-2026-41427 (opens in a new tab)How to fix?
Upgrade @better-auth/oauth-provider to version 1.6.5, 1.7.0-beta.2 or higher.
Overview
@better-auth/oauth-provider is an An oauth provider plugin for Better Auth
Affected versions of this package are vulnerable to Incorrect Authorization via the createOAuthClientEndpoint endpoint. An attacker can gain unauthorized access to register OAuth clients by bypassing the intended clientPrivileges authorization checks, allowing the creation of clients with attacker-controlled redirect URIs and metadata. This may lead to increased risk of phishing, social engineering, and abuse of trust in OAuth/OIDC flows.