Vulnerability · Published Aug 1, 2026 · Assigned by VulnCheck

CVE-2026-67334better-auth Stale Sessions Persist After User Deletion

Low 3.8

In plain English

A low-severity security flaw in better-auth from better-auth. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.8Low

Exploit odds (30 days)0.3%top 74.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@better-auth/scim	1.6.11	GHSA-2vg6-77g8-24mp
npm	better-auth	1.6.11	GHSA-2vg6-77g8-24mp

Affected products (as reported)

Vendor	Product	Versions
better-auth	better-auth	0.3.4 – before 1.6.11
better-auth	better-auth	1.6.0 – before 1.6.11

Weakness: CWE-459 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-2vg6-77g8-24mp) vendor-advisory
VulnCheck Advisory: better-auth Stale Sessions Persist After User Deletion third-party-advisory