PT-2025-49391 · Npm · Better Auth

Publicado 2025-11-26 · Atualizado 2025-11-26

OSV

CVSS v3.1

9.6

Crítica

Vetor base

AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Summary

A vulnerability was identified in the multi-session plugin for Better Auth, specifically in the /sign-out after-hook. The hook trusts raw multi-session cookies and forwards the extracted values directly to internalAdapter.deleteSessions without verifying the cookie signature. Because cookie values are not validated with getSignedCookie (or any equivalent check), an attacker can supply a forged multi-* cookie to trigger deletion of arbitrary session tokens.

Correção

Improper Authentication

Insufficient Verification of Data Authenticity

Enumeração de Fraquezas

CWE-287

CWE-345

Identificadores relacionados

GHSA-WMJR-V86C-M9JJ

Produtos afetados

Better Auth

Referências · 5

• https://github.com/better-auth/better-auth · Nota
• https://github.com/better-auth/better-auth/releases/tag/v1.4.0 · Nota
• https://github.com/better-auth/better-auth/commit/cfc453a2a6eb02951f9a0a7c944064936e73eee8 · Nota
• https://github.com/better-auth/better-auth/security/advisories/GHSA-wmjr-v86c-m9jj · Nota
• https://osv.dev/vulnerability/GHSA-wmjr-v86c-m9jj · Aviso do Fabricante