Skip to content
OpenAdvisories
Medium · 6.9 CVE-2026-41161 EUVD-2026-28551GHSA-43fj-qp3h-hrh5

Username Enumeration via Timing Attack

Published May 8, 2026 · Updated May 11, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
Sync-in server < 2.2.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @sync-in/server < 2.2.0 2.2.0 GHSA-43fj-qp3h-hrh5

References