CVE-2026-67334: Better-Auth

Low severity, CVSS 3.8. EPSS: 0.3% chance of exploitation in the next 30 days.

better-auth versions before 1.6.11 fail to delete cached sessions when removing users via admin, anonymous, or SCIM endpoints when secondaryStorage is configured and storeSessionInDatabase is false. Attackers can reuse deleted user session tokens to maintain authentication for up to seven days after account deletion.

Affected products

• Better-Auth Better-Auth: from 0.3.4, before 1.6.11 (fixed in 1.6.11); from 1.6.0, before 1.6.11 (fixed in 1.6.11)

Published 2026-08-01. Last modified 2026-10-08.