CVE-2026-41161 Details
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.
A logic flaw in the Sync-in Server authentication API endpoint prior to version 2.2.0 allows unauthenticated remote attackers to enumerate valid usernames by analyzing response times. This vulnerability facilitates targeted brute-force attacks and other social engineering tactics.
Users can upgrade to Sync-in Server version 2.2.0 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 | CISA-ADP | Vendor Advisory |
| https://github.com/Sync-in/server/releases/tag/v2.2.0 | [email protected] | PatchProduct |
| https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-208 | Observable Timing Discrepancy | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sync-in sync-in server | < 2.2.0 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | CVE Modified | CISA-ADP |
| May 8, 2026 | New CVE Received | [email protected] |