CVE-2026-53512
CVE-2026-53512 · Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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 · Critique · EPSS 0,3% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
better-auth
- Versions du logiciel
- < 1.6.11: Concernée
Aucun correctif publié
better-auth npm
- Plages de versions concernées
- SEMVER: < 1.6.11
Mettez à jour vers 1.6.11
Sources 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