CyberRota Analysis
AI-GeneratedThe Better Auth library for TypeScript versions 1.4.8-beta.7 through 1.6.11 is vulnerable due to a non-atomic process in handling refresh tokens, which can allow multiple concurrent requests to bypass revocation checks and create unauthorized refresh-token families. This vulnerability poses a significant risk of token misuse and unauthorized access to user sessions. Organizations using affected versions of Better Auth should prioritize upgrading to version 1.6.11 or later to mitigate potential security breaches.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Better Auth is an authentication and authorization library for TypeScript. From 1.4.8-beta.7 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint on the refresh_token grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing concurrent requests with the same parent refresh token to pass the revoked check and create forked refresh-token families; the vulnerable range also includes embedded better-auth plugin versions before 1.6.0. This issue is fixed in version 1.6.11.
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