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.
History

Sat, 18 Jul 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 15 Jul 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Better-auth
Better-auth better Auth
Vendors & Products Better-auth
Better-auth better Auth

Wed, 15 Jul 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title Better Auth: Unauthorized invitation acceptance via unverified email match in organization plugin
Weaknesses CWE-287
CWE-345
CWE-441
CWE-862
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-15T17:30:46.069Z

Updated: 2026-07-18T01:13:02.175Z

Reserved: 2026-06-09T17:30:33.456Z

Link: CVE-2026-53514

cve-icon Vulnrichment

Updated: 2026-07-18T01:12:57.232Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-15T18:16:47.683

Modified: 2026-07-21T13:41:03.313

Link: CVE-2026-53514

cve-icon Redhat

No data.