CVE-2026-53514
Better Auth: Unauthorized invitation acceptance via unverified email match in organization plugin
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 36 days later
· 36 days later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.
Weakness
- CWE-287: Improper Authentication (opens in a new tab)All about CWE-287 and its CVEs
- CWE-345: Insufficient Verification of Data Authenticity (opens in a new tab)All about CWE-345 and its CVEs
- CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') (opens in a new tab)All about CWE-441 and its CVEs
- CWE-862: Missing Authorization (opens in a new tab)All about CWE-862 and its CVEs
Affected products
- affected < 1.6.11
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmbetter-authGHSA-fmh4-wcc4-5jm3 (opens in a new tab)
References (4)
- https://github.com/better-auth/better-auth/security/advisories/GHSA-fmh4-wcc4-5jm3 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/better-auth/better-auth/pull/9577 (opens in a new tab)x_refsource_MISC
- https://github.com/better-auth/better-auth/commit/23094a628f007f801be6d26e5b15dc5fc6fc4eb8 (opens in a new tab)x_refsource_MISC
- https://github.com/better-auth/better-auth/releases/tag/v1.6.11 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-fmh4-wcc4-5jm3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-53514)Record last updated .