CVE-2026-67332

@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...

@anchrd/gate (>=0.28.0, <=0.40.0), @anchrd/gate-api (>=0.1.1, <=0.26.0) +29 more potentially affected by CVE-2026-67332 via @better-auth/oauth-provider (>=1.5.5, <=1.6.28)

@better-auth/oauth-provider NPM version =1.5.5, =0.28.0, =0.1.1, =1.0.0, =2.0.0, =2.0.0, =0.0.0-dev-20260121145510, =0.0.0-chat-to-edit-20251119071712, =0.0.0-dev-20260410224321, =0.0.0-chat-to-edit-20251119071712, =0.0.0-chat-to-edit-20251119071712, =0.0.0-chat-to-edit-20251119071712,...

CVE-2026-67332: Improper Authorization

@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...

CVE-2026-53517

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 refreshtoken grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing...

CVE-2026-53517: Concurrent Execution using Shared Resource with Improper Synchronization

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 refreshtoken grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing...

CVE-2026-53518: Concurrent Execution using Shared Resource with Improper Synchronization

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

PT-2026-60915

Am I affected? Users are affected if all of the following hold: - Their application depends on @better-auth/oauth-provider on any stable 1.6.x release the stable line is not patched or on a pre-release before 1.7.0-beta.4. - Their application either configures validAudiences with more than one...

PT-2026-35333

Am I affected? You're affected if all of the following are true: - Using @better-auth/oauth-provider at version specified below - You configured clientPrivileges in the plugin options expecting it to gate who can create OAuth clients - The /oauth2/create-client or /admin/oauth2/create-client...