CVE-2026-67334 better-auth Stale Sessions Persist After User Deletion
Attackers can reuse session tokens of deleted users to maintain authentication for up to seven days when secondary storage is configured without database session storage.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67334?
CVE-2026-67334 is a medium-severity authentication bypass vulnerability in better-auth, published on 1 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-459
Which versions are affected by CVE-2026-67334?
4 open source packages ship an affected version, including @better-auth/scim and better-auth.
| Package | Affected | Fixed in |
|---|---|---|
@better-auth/scim npm | From 1.6.0 | 1.6.11 |
@better-auth/scim npm | From 1.6.0 | 1.6.11 |
better-auth npm | From 0.3.4 | 1.6.11 |
better-auth npm | From 0.3.4 | 1.6.11 |
How do I fix CVE-2026-67334?
Upgrade @better-auth/scim to 1.6.11 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-67334 being exploited?
There is no known exploitation of CVE-2026-67334 in the wild and no public exploit code.
Sources
Also known as GHSA-2vg6-77g8-24mp, GHSA-gj53-4jmf-7745.