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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-43fj-qp3h-hrh5 Sync-in Server has Username Enumeration via Timing Attack
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 12 May 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Sync-in sync-in Server
CPEs cpe:2.3:a:sync-in:sync-in_server:*:*:*:*:*:*:*:*
Vendors & Products Sync-in sync-in Server
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Mon, 11 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Sync-in
Sync-in server
Vendors & Products Sync-in
Sync-in server

Fri, 08 May 2026 13:30:00 +0000

Type Values Removed Values Added
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.
Title Username Enumeration via Timing Attack
Weaknesses CWE-208
References
Metrics cvssV4_0

{'score': 6.9, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-11T18:24:40.217Z

Reserved: 2026-04-17T16:34:45.524Z

Link: CVE-2026-41161

cve-icon Vulnrichment

Updated: 2026-05-11T18:24:08.419Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T14:16:33.093

Modified: 2026-05-12T15:00:33.713

Link: CVE-2026-41161

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T15:30:05Z

Weaknesses