Vulnerability Description
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 registration is enabled. An attacker registers an account with the victim's email address and an attacker-chosen password; the account remains unverified. When the legitimate owner later signs in via the magic-link or email-OTP passwordless flow, the account is marked verified without removing the pre-existing password or revoking existing sessions, so the attacker's password remains valid, granting persistent access to the victim's account. Fixed in 1.6.22 and 1.7.0-beta.10.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/better-auth/better-auth/security/advisories/GHSA-qq9h-g4jm-xg
- https://www.vulncheck.com/advisories/better-auth-before-account-takeover-via-mag
FAQ
What is CVE-2026-67327?
CVE-2026-67327 is a vulnerability with a CVSS score of 8.3 (HIGH). 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-...
How severe is CVE-2026-67327?
CVE-2026-67327 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-67327?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.