High 8.3Published Jul 15, 2026

CVE-2026-53516Better Auth is an authentication and authorization library for TypeScript.

Updated under an hour ago (2026-10-19 10:30 UTC)

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It affects better-auth better_auth. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for better-auth better_auth

Exploited in the last 30 days

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.

CVSS: 8.3 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Weakness (CWE): CWE-287, CWE-345
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

better-auth better_auth better-auth:better_auth	before 1.6.11	NVD

References

https://github.com/better-auth/better-auth/commit/da7e50beee849c59a2ed1ec6b3a38cc6ab9fb563patch
https://github.com/better-auth/better-auth/pull/9578issue-tracking, patch
https://github.com/better-auth/better-auth/releases/tag/v1.6.11release-notes
https://github.com/better-auth/better-auth/security/advisories/GHSA-g38m-r43w-p2q7mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.