5.3Media
CVE-2026-67335better-auth before 1.6.2 OAuth State Validation Bypass
Descripción
better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the stored nonce when using cookie-backed state storage without PKCE. Attackers can forge the state parameter and supply an attacker-controlled authorization code to create authenticated sessions bound to the attacker's external identity or persistently link attacker accounts to victim profiles.
Debilidad (CWE):
CWE-287
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| better-auth | better-auth | < 1.6.2, fixed 1.6.2 | |
| better-auth | better-auth/oauth-provider | < 1.6.2 |
Referencias y parches
- GitHub Security Advisory (GHSA-wxw3-q3m9-c3jr) vendor-advisory
- VulnCheck Advisory: better-auth before 1.6.2 OAuth State Validation Bypass third-party-advisory