CVE-2026-41161 MEDIUM

CVE-2026-41161: Username Enumeration via Timing Attack

Vendor Sync-In
Product server
Weakness CWE-208
Published May 8, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 11, 2026 Record updated