What is CVE-2026-67327?

CVE-2026-67327 is a high-severity vulnerability in Better-auth, classified under Improper Authentication. CVSS score: 8.3/10. Published 2026-08-01.

How severe is CVE-2026-67327?

High severity. CVSS v3 base score is 8.3 out of 10.

Auth bypass in Better-auth

CVE-2026-67327

better-auth versions >= 1.1.3 and < 1.6.22 (and pre-release versions >= 1.7.0-beta.0 and < 1.7.0-beta.10) are vulnerable to account takeover via pre-account hijacking on magic-link and email-OTP sign-in when open email/password registratio…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L.

Affected products

Better-auth — versions 1.1.3, 1.6.22, 1.7.0-beta.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-67327?: CVE-2026-67327 is a high-severity vulnerability in Better-auth, classified under Improper Authentication. CVSS score: 8.3/10. Published 2026-08-01.
How severe is CVE-2026-67327?: High severity. CVSS v3 base score is 8.3 out of 10.