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2 vulnerabilities found for oauth-provider by better-auth

CVE-2026-67332 (GCVE-0-2026-67332)
Vulnerability from cvelistv5
Published
2026-08-01 12:22
Modified
2026-08-03 18:32
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CWE
Summary
@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never covered, bypassing intended authorization boundaries.
References
Impacted products
Vendor Product Version
better-auth oauth-provider Version: 1.4.8   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-41427 (GCVE-0-2026-41427)
Vulnerability from cvelistv5
Published
2026-04-24 19:23
Modified
2026-04-27 13:42
Severity ?
7.1 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
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.
References
Impacted products
Vendor Product Version
better-auth better-auth Version: >= 1.4.8-beta.7, < 1.6.5
Version: >= 1.7.0-beta.0, <= 1.7.0-beta.1
 Create a notification for this product.
   better-auth oauth-provider Version: >= 1.4.8-beta.7, < 1.6.5
Version: >= 1.7.0-beta.0, <= 1.7.0-beta.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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