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.

CVSS Vector

References

• https://github.com/better-auth/better-auth/security/advisories/GHSA-xg6x-h9c9-2m83
• https://www.vulncheck.com/advisories/better-auth-before-two-factor-authentication-bypass-via-session-cookiecache