CVE-2026-58271

Katalog CVE

CVSS 6.8 · Medium EPSS 0,22%

Kerentanan Improper Restriction of Excessive Authentication Attempts. Skor CVSS 3.1 6.8 (Medium) menurut github.com.

Deskripsi (NVD)

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST /api/app/sync/register` accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, `SyncClientsManager.register()` calls `updateAccesses(user, ip, false)`, which hits a freeze branch that writes `passwordAttempts` back unchanged. The counter never reaches `USER_MAX_PASSWORD_ATTEMPTS` (10) and the lockout gate never fires. A successful guess returns a `{clientId, clientToken}` pair. The token can be exchanged via `POST /api/app/sync/auth/cookie` for a full JWT. While the code is valid, the attacker can also call `POST /api/auth/2fa/disable` to permanently remove MFA. Version 2.4.0 patches the issue.

Rincian

Terbit di NVD

21 September 2026

Terakhir diubah

24 September 2026

Status NVD

Deferred

CVSS 3.1

6.8 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-307: Improper Restriction of Excessive Authentication Attempts

EPSS (30 hari)

0,22% peluang dieksploitasi; lebih tinggi dari 11,4% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/Sync-in/server/security/advisories/GHSA-274f-6w77-8qm9