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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-110861

Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

better-auth drizzle-adapter

Default version status: unaffected

  • 1.6.17 to < 1.7.7affected
  • 1.7.7unaffected
pkg:npm/%40better-auth/drizzle-adapter

better-auth kysely-adapter

Default version status: unaffected

  • 1.6.17 to < 1.7.0affected
  • 1.7.0unaffected
pkg:npm/%40better-auth/kysely-adapter

better-auth better-auth

Default version status: unaffected

  • 1.6.17 to < 1.7.7affected
  • 1.7.7unaffected
pkg:npm/better-auth

References