CVE-2026-41161

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...

CVE-2026-41161 Username Enumeration via Timing Attack

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...

CVE-2026-41161

Summary: CVE-2026-41161 affects Sync-in Server before version 2.2.0. The /api/auth/login endpoint exposes a timing-based flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring response times. This is confirmed in the GitHub advisory and CVE descriptions, which...