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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-53514

33
FAUCET Score

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.

First published: Jul 15, 2026Last modified: Jul 15, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.11CPE matchmatch criteria
cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*
>= 1.6.14CPE matchmatch criteria
cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.14%
Probability of exploitation in next 30 days
EPSS Percentile
3.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0014 is in the 2nd percentile among its peer group of 102 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: better-authFixed in: 1.6.11

Vendor Advisories (1)

npmGHSA-fmh4-wcc4-5jm3high

Better Auth vulnerable to unauthorized invitation acceptance via unverified email match in organization plugin

Jul 7, 2026

References

github.com / better-auth/better-auth/commit/23094a628f007f801be6d26e5b15dc5fc6fc4eb8
Patch
github.com / better-auth/better-auth/pull/9577
Issue TrackingPatch
github.com / better-auth/better-auth/releases/tag/v1.6.11
Release Notes
github.com / better-auth/better-auth/security/advisories/GHSA-fmh4-wcc4-5jm3
MitigationVendor Advisory