What is CVE-2026-44213?

CVE-2026-44213 is a medium-severity vulnerability in Open-telemetry Opentelemetry-dotnet-contrib, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-05-26.

How severe is CVE-2026-44213?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Open-telemetry Opentelemetry-dotnet-contrib

CVE-2026-44213

The OpenTelemetry.Exporter.Instana exports telemetry to Instana backend. Prior to 1.1.0, the OpenTelemetry.Exporter.Instana NuGet package does not validate HTTPS/TLS certificates are valid when sending telemetry to a configured Instana bac…

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (0.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Open-telemetry Opentelemetry-dotnet-contrib — versions < 1.1.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44213?: CVE-2026-44213 is a medium-severity vulnerability in Open-telemetry Opentelemetry-dotnet-contrib, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-05-26.
How severe is CVE-2026-44213?: Medium severity. CVSS v3 base score is 6.5 out of 10.