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. This issue has been patched in version 2.2.0.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Sync-in/server/releases/tag/v2.2.0	Patch Product
https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5	Vendor Advisory
https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:sync-in:sync-in_server:*:*:*:*:*:*:*:*

History

12 May 2026, 15:00

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
First Time		Sync-in sync-in Server Sync-in
References	~~() https://github.com/Sync-in/server/releases/tag/v2.2.0 -~~	() https://github.com/Sync-in/server/releases/tag/v2.2.0 - Patch, Product
References	~~() https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 -~~	() https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 - Vendor Advisory
CPE		cpe:2.3:a:sync-in:sync-in_server::::::::

11 May 2026, 19:16

Type	Values Removed	Values Added
References	~~() https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 -~~	() https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 -

08 May 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-08 14:16

Updated : 2026-05-12 15:00

NVD link : CVE-2026-41161

Mitre link : CVE-2026-41161

CVE.ORG link : CVE-2026-41161

JSON object : View

Products Affected

sync-in

sync-in_server

CWE

CWE-208

Observable Timing Discrepancy

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