HOMEVULNERABILITIESCVE-2026-41161
MEDIUM

CVE-2026-41161

CWE-208Published: May 8, 2026· Updated: May 12, 2026

5.3
CVSS v3.1
EPSS:0.14%probability of exploitation in 30 daysPercentile:33.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-41161 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

sync-in1 product
sync-in server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/Sync-in/server/releases/tag/v2.2.0
ADVISORYhttps://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
ADVISORYhttps://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5

All References (3)

→
https://github.com/Sync-in/server/releases/tag/v2.2.0Patch · Product
→
https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5Vendor Advisory
→
https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5Vendor Advisory

Quick Facts

CVE IDCVE-2026-41161
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-208
CISA KEVNo
EPSS (30d)0.14%
Affected1 vendor
PublishedMay 8, 2026

Related CVEs (CWE-208)

CVE-2026-42602
8.1
CVE-2026-41588
8.1
CVE-2026-47784
8.1
CVE-2026-47783
8.1
CVE-2026-28464
7.5
CVE-2026-47373
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-41161 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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CVE-2026-41161 — CVSS 5.3 MEDIUM | CTIWATCH.COM