How severe is CVE-2026-41161?

CVE-2026-41161 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-41161 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41161?

CVE-2026-41161 affects Sync-in Sync-in Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41161?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41161 have an EU (EUVD) identifier?

Yes. CVE-2026-41161 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28551.

When was CVE-2026-41161 published?

CVE-2026-41161 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-41161

CVE-2026-41161 is a medium-severity vulnerability in Sync-in Sync-in Server with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-208.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28551
Weakness: CWE-208
Affected product: Sync-in Sync-in Server
Published: 2026-05-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-41161?: CVE-2026-41161 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-41161 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41161?: CVE-2026-41161 affects Sync-in Sync-in Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41161?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41161 have an EU (EUVD) identifier?: Yes. CVE-2026-41161 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28551.
When was CVE-2026-41161 published?: CVE-2026-41161 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

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

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