CVE-2026-67327: high-severity vulnerability in better-auth
better-auth before 1.6.22 Account Takeover via Magic-Link Email-OTP
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.4%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products
better-auth · better-authRelated CVEs — better-auth
In the same product, most dangerous first.
CVE-2025-61928CRITICALBetter Auth: Unauthenticated API key creation through api-key pluginEPSS 19.7%CVE-2025-71404MEDIUMbetter-auth before 1.1.16 Reflected XSS via error parameterEPSS 0.7%CVE-2025-71399HIGHBetter Auth before 1.4.5 Path Normalization Bypass via rou3EPSS 0.5%CVE-2026-67337HIGHbetter-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCacheEPSS 0.5%CVE-2025-71401CRITICALbetter-auth before 1.4.2 basePath Modification DoSEPSS 0.5%CVE-2026-53515HIGHBetter Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/ssoEPSS 0.4%