CVE-2026-110861
Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
Better Auth @better-auth/drizzle-adapter and better-auth from 1.6.17 before 1.7.7, and @better-auth/kysely-adapter from 1.6.17 before 1.7.0, contain a race condition in database-backed rate limiting on PostgreSQL where the limit check is not atomic with the counter update. Remote attackers can send bursts of concurrent requests that pass the check together, exceeding configured limits on password sign-in, two-factor verification, one-time code, password reset, and other rate-limited endpoints.
| CWE | CWE-307 |
| Vendor | better-auth |
| Product | drizzle-adapter |
| Published | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
better-auth / drizzle-adapter
1.6.17 < 1.7.7
better-auth / kysely-adapter
1.6.17 < 1.7.0
better-auth / better-auth
1.6.17 < 1.7.7
References
Credits
🔍 designorant