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Vulnerabilities

Vulnerability · CVE-2025-49015

Couchbase .NET SDK (client library) does not properly enable hostname verification for TLS certificates

Published Jun 18, 2025 · catalog updated Oct 19, 2026 · Couchbase .NET SDK (client

Open the advisory

Exploitation likelihood is not on this record for CVE-2025-49015. A missing EPSS score is not a low risk. Compare Couchbase .NET SDK (client with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Couchbase .NET SDK (client).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium4.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
NuGet CouchbaseNetClient

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • NuGet CouchbaseNetClient0 → 3.7.1

How to fix CVE-2025-49015

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2025-49015. A missing EPSS score is not a low risk. Compare Couchbase .NET SDK (client with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with CouchbaseNetClient 0 → 3.7.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-297. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 18, 2025 · GitHub Advisory Database

    Detected

    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.

  2. Oct 19, 2026 · GitHub Advisory Database

    Fix available

    CouchbaseNetClient fixed in 3.7.1

  3. Oct 19, 2026 · GitHub Advisory Database

    Fix available

    CouchbaseNetClient fixed in 3.7.1

  4. Oct 19, 2026 · GitHub Advisory Database

    Updated

    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.

Sources

References

Freshness

Last verified in this catalog Oct 19, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.