CVE-2026-53512
CVE-2026-53512 · Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the legacy oidcProvider and mcp plugins expose OAuth token endpoints whose refresh_token grant authenticates only possession of the bound refreshToken row and matching client_id, without verifying the confidential client's client_secret, allowing an attacker with a valid refresh_token to mint access tokens and rotated refresh tokens through /api/auth/oauth2/token or /api/auth/mcp/token. The @better-auth/oauth-provider package is not affected. This issue is fixed in version 1.6.11.
CVSS 9.1 · Crítica · EPSS 0,3% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
better-auth
- Versiones
- < 1.6.11: Afectada
Sin corrección publicada
better-auth npm
- Intervalos de versiones afectados
- SEMVER: < 1.6.11
Actualiza a 1.6.11
Fuentes originales
- https://github.com/better-auth/better-auth/security/advisories/GHSA-pw9m-5jxm-xr6h
- https://github.com/better-auth/better-auth/pull/9576
- https://github.com/better-auth/better-auth/commit/1f2ff4215c4affff0b140b0c0a712c0dde35659c
- https://github.com/better-auth/better-auth/releases/tag/v1.6.11
- https://nvd.nist.gov/vuln/detail/CVE-2026-53512