CVE-2026-41161— Username Enumeration via Timing Attack
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I. Basic Information for CVE-2026-41161
Vulnerability Information
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Vulnerability Title
Username Enumeration via Timing Attack
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.2.0, the /api/auth/login endpoint contains a logic flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. This issue has been patched in version 2.2.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过时间差异性导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Sync in 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sync in是Sync-in开源的一个服务器同步平台。 Sync in 2.2.0之前版本存在安全漏洞，该漏洞源于/api/auth/login端点存在逻辑缺陷，可能导致未授权远程攻击者通过响应时间枚举有效用户名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-41161
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- Release v2.2.0 · Sync-in/server · GitHubx_refsource_MISC
- Username Enumeration via Timing Attack · Advisory · Sync-in/server · GitHubx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-41161
IV. Related Vulnerabilities
Same weakness: CWE-208
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V. Comments for CVE-2026-41161
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