CVE-2026-44213
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
The OpenTelemetry.Exporter.Instana NuGet package prior to version 1.1.0 does not validate HTTPS/TLS certificates when sending telemetry to a configured Instana backend via a proxy defined by the INSTANA_ENDPOINT_PROXY environment variable. A network attacker capable of Man-in-the-Middle (MitM) attacks on the proxy connection can intercept all OpenTelemetry telemetry data and the Instana API key.
Risk Assessment
The risk includes full disclosure of telemetry data and the Instana API key to an attacker, potentially leading to data theft and unauthorized access to the backend.
Recommendation
Update the OpenTelemetry.Exporter.Instana package to version 1.1.0 or later.
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Original NVD description (English source)
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 back-end when a proxy is configured using the INSTANA_ENDPOINT_PROXY environment variable. If a network attacker can Man-in-the-Middle (MitM) the proxy connection, all OpenTelemetry telemetry data and the Instana API key are exposed to the attacker. This vulnerability is fixed in 1.1.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

