CVE-20XX-?
agent?

CVE-2026-53516

8.3 HIGH 0.3% exploit odds Fix listed Auth & access Library

What it is

Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, Better Auth's OAuth callback auto-link gate in handleOAuthUserInfo accepts implicit account linking when the OAuth provider asserts email_verified: true without requiring the local user row's emailVerified field to also be true, allowing an attacker who pre-registers a victim email through /sign-up/email to bind the victim's OAuth identity to the attacker's account. The same primitive affects one-tap, and emailAndPassword.requireEmailVerification: true does not mitigate the link-time verification change. This issue is fixed in version 1.6.11.

At a glance

Exploitability
Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering.
Exploit odds
0.3% chance of exploitation in the next 30 days (EPSS).
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
0.3% · EPSS, next 30 days
Weakness
CWE-287 · Improper authentication
Record status
Analyzed

Affected

Attack profile CVSS 3.1 · 8.3

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low
Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record