Vulnerability in Couchbase .Net Sdk
CVE-2025-49015
The Couchbase .NET SDK (client library) before 3.7.1 does not properly enable hostname verification for TLS certificates. In fact, the SDK was also using IP addresses instead of hostnames due to a configuration option that was incorrectly enabled by default.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
Weakness classification (CWE)
References
- forums.couchbase.com/tags/security (Issue Tracking)
- docs.couchbase.com/server/current/release-notes/relnotes.html (Release Notes)
- www.couchbase.com/alerts/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-49015?
- CVE-2025-49015 is a medium-severity vulnerability in Couchbase .Net Sdk, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.9/10. Published 2025-06-18.
- How severe is CVE-2025-49015?
- Medium severity. CVSS v3 base score is 4.9 out of 10.