Open Redirect Affecting better-auth package, versions <1.6.13>=1.7.0-beta.0 <1.7.0-beta.4
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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Test your applications- Snyk IDSNYK-JS-BETTERAUTH-17889822
- published8 Jul 2026
- disclosed7 Jul 2026
- credithilalee
Introduced: 7 Jul 2026
CVE-2026-67333 (opens in a new tab)How to fix?
Upgrade better-auth to version 1.6.13, 1.7.0-beta.4 or higher.
Overview
better-auth is a The most comprehensive authentication library for TypeScript.
Affected versions of this package are vulnerable to Open Redirect via the redirectURI value returned from the consent response in the authorization flow. An attacker can execute arbitrary JavaScript in the authorization server's origin by registering a client with a crafted javascript: URI and tricking a user into approving consent, leading to exposure of session data and potential account takeover.
Note: This is only exploitable if the consent page assigns the returned redirectURI to a browser navigation target such as window.location.href, location.assign, or location.replace.