Unrated severityNVD Advisory· Published Aug 1, 2026· Updated Aug 3, 2026
better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache
CVE-2026-67337
Description
better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.
Affected products
1- Range: <1.4.9
Patches
Vulnerability mechanics
References
2- github.com/better-auth/better-auth/security/advisories/GHSA-xg6x-h9c9-2m83mitrevendor-advisory
- www.vulncheck.com/advisories/better-auth-before-two-factor-authentication-bypass-via-session-cookiecachemitrethird-party-advisory
News mentions
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