EUVD-2026-51836

@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...

GHSA-P2FR-6HMX-4528 @better-auth/oauth-provider may provide access tokens for unauthorized audiences via unbound resource indicators

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...