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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-110864

Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy

Description

Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

better-auth better-auth

Default version status: unaffected

  • 1.5.0-beta.12 to < 1.7.7affected
  • 1.7.7unaffected
pkg:npm/better-auth

References