VULNERABILITY INTELLIGENCE

CVE-2026-53514

CVSS score7.7 HIGH
EPSS probability0.20%
CISA KEVNot currently listed
Published2026-07-15
Last modified2026-07-21
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Description

Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, and in 1.6.14 and later when invitation IDs can be obtained outside the invited mailbox and requireEmailVerificationOnInvitation: true is not enabled, the organization plugin's acceptInvitation, rejectInvitation, getInvitation, and listUserInvitations recipient endpoints use session.user.email and an invitation ID without sufficient verified-email ownership proof, allowing a user with an unverified session for the invited email address to accept an organization invitation after obtaining the invitation ID. This issue is fixed for the original default behavior in version 1.6.11, while 1.6.14 restored compatibility for built-in opaque invitation IDs and leaves affected configurations requiring secure options.

Weakness classification

  • CWE-287: Improper Authentication
  • CWE-345: Insufficient Verification of Data Authenticity
  • CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')
  • CWE-862: Missing Authorization

Primary references