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CVE-2026-110861 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:3.7 LOWVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/better-auth/better-auth/security/advisories/GHSA-44jh-23m7-hpcf	[email protected]
https://www.vulncheck.com/advisories/better-auth-drizzle-adapter-1.6.17-before-1.7.7-rate-limit-bypass-via-race-condition	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-307	Improper Restriction of Excessive Authentication Attempts	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 20, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	[email protected]