CVE-2026-53517

תיאור (מקור, אנגלית)

Better Auth is an authentication and authorization library for TypeScript. From 1.4.8-beta.7 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint on the refresh_token grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing concurrent requests with the same parent refresh token to pass the revoked check and create forked refresh-token families; the vulnerable range also includes embedded better-auth plugin versions before 1.6.0. This issue is fixed in version 1.6.11.

מדדים

CVSS 3.1

8.1 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-8/8/2026

CWE

CWE-362, CWE-367

מוצרים מושפעים

better-auth: better-auth\/oauth-provider; better-auth: better auth

קישורים

• https://github.com/better-auth/better-auth/security/advisories/GHSA-392p-2q2v-‮… MitigationVendor Advisory
• https://github.com/better-auth/better-auth/commit/c6918ecc9e3a75892169415d7f6c‮… Patch
• https://github.com/better-auth/better-auth/releases/tag/v1.6.11 Release Notes