Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition
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.
CVE-2026-110861
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110861
drizzle-adapter
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
kysely-adapter
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
better-auth
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "better-auth",
"product": "drizzle-adapter",
"versions": [
{
"status": "affected",
"version": "1.6.17",
"lessThan": "1.7.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.7.7",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/%40better-auth/drizzle-adapter",
"defaultStatus": "unaffected"
},
{
"vendor": "better-auth",
"product": "kysely-adapter",
"versions": [
{
"status": "affected",
"version": "1.6.17",
"lessThan": "1.7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.7.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/%40better-auth/kysely-adapter",
"defaultStatus": "unaffected"
},
{
"vendor": "better-auth",
"product": "better-auth",
"versions": [
{
"status": "affected",
"version": "1.6.17",
"lessThan": "1.7.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.7.7",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/better-auth",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110861
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #42084 · Revision 1
- Added to Heist Feed
- Publisher date