CVE-2026-41161CWE-208

Username Enumeration via Timing Attack

Medium · published May 8, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00457 · 38.7th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2026-05-08T13:00Z
EPSS history
Timeline
  • 08 MAY 13:00Z
    Username Enumeration via Timing Attack
    cvelistv5