Improper Authentication Affecting better-auth package, versions >=1.4.0-beta.18 <1.7.7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published23 Oct 2026
- disclosed22 Oct 2026
- creditrick-v12, Moritz Schneider
Introduced: 22 Oct 2026
NewCVE-2026-114607 (opens in a new tab)How to fix?
Upgrade better-auth to version 1.7.7 or higher.
Overview
better-auth is a The most comprehensive authentication library for TypeScript.
Affected versions of this package are vulnerable to Improper Authentication via insufficient isolation of verification records across different authentication flows. Because magic-link tokens and OAuth state tokens share the same verification storage namespace without purpose-binding, an attacker can substitute a verification record from one flow (e.g., an OAuth state token) in place of a magic-link token to satisfy the magic-link verification check, bypassing authentication and potentially gaining unauthorized account access.
Note: This is only exploitable when OAuth state uses account.storeStateStrategy: "database", which is the default when a database or secondary storage is configured.