CVE-2026-58272— Sync-in Server has Username/Login Enumeration via Timing Side-Channel on POST /api/auth/login (incomplete fix of the prior timing-attack advisory)
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. Versions prior to 2.4.1 contain an observable timing discrepancy in the login endpoint because authentication attempts for nonexistent accounts return without perf
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一、 漏洞 CVE-2026-58272 基础信息
漏洞信息
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Vulnerability Title
Sync-in Server has Username/Login Enumeration via Timing Side-Channel on POST /api/auth/login (incomplete fix of the prior timing-attack advisory)
来源: CVE Program / CVE List V5
Vulnerability Description
Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Versions prior to 2.4.1 contain an observable timing discrepancy in the login endpoint because authentication attempts for nonexistent accounts return without performing the bcrypt comparison used for existing accounts. An unauthenticated attacker can measure response times to enumerate valid usernames or email addresses, facilitating credential-stuffing, password-spraying, and phishing attacks. Version 2.4.1 contains a patch.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-58272 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-58272 其他参考 (1)
同批安全公告 · Sync-in · 2026-09-21 · 共 4 条
| CVE-2026-58269 | 8.1 HIGH | Sync-in Server has a complete 2FA Bypass via `POST /api/auth/token` |
| 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` |
IV. Related Vulnerabilities
Same product: server
Same vendor: Sync-in
Same weakness: CWE-208
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V. Comments for CVE-2026-58272
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