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Vulnerabilities CVE-2026-53514

CVE-2026-53514

High
Open
TLP:CLEAR

Better Auth: Unauthorized invitation acceptance via unverified email match in organization plugin

NVD CVE.org
Critical Infrastructure

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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.

Details

CVSS Score
7.7
EPSS Score
0.14%

3.7th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Confidence
90%
Published
Jul 15, 2026
Last Modified
Jul 18, 2026
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