Answer in brief
CVE-2026-110861 records a Medium severity (CVSS 6.3) vulnerability in Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition. The current sources do not mark it as known exploited. The current feed maps better-auth/better-auth (generic), better-auth/drizzle-adapter (generic), better-auth/kysely-adapter (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps better-auth/better-auth (generic), better-auth/drizzle-adapter (generic), better-auth/kysely-adapter (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| better-auth/better-authgeneric | >=1.6.17 <1.7.7 | 1.7.7 |
| better-auth/drizzle-adaptergeneric | >=1.6.17 <1.7.7 | 1.7.7 |
| better-auth/kysely-adaptergeneric | >=1.6.17 <1.7.0 | 1.7.0 |
Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.