CVE-2026-58269— Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token`
一分钟漏洞结论
影响对象
Sync-in server
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, authenticates with username and password only, then calls , which returns full access and refresh JWTs without checking whether the account
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一、 漏洞 CVE-2026-58269 基础信息
漏洞信息
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Vulnerability Title
Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token`
来源: CVE Program / CVE List V5
Vulnerability Description
Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST /api/auth/token` authenticates with username and password only, then calls `getTokens()`, which returns full access and refresh JWTs without checking whether the account has TOTP 2FA enabled. An attacker with stolen or phished credentials can bypass 2FA in a single request. The parallel login endpoint (`POST /api/auth/login`) correctly enforces 2FA by calling `setCookies(user, res, true)`, which gates on `user.twoFaEnabled`. Version 2.4.0 patches the issue.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-58269 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-58269 其他参考 (1)
同批安全公告 · Sync-in · 2026-09-21 · 共 4 条
| CVE-2026-58271 | 6.8 MEDIUM | @sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register` |
| CVE-2026-58270 | 6.5 MEDIUM | Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters` |
| CVE-2026-58272 | 5.3 MEDIUM | Sync-in Server has Username/Login Enumeration via Timing Side-Channel on POST /api/auth/lo |
IV. Related Vulnerabilities
V. Comments for CVE-2026-58269
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