CVE-2026-44213: medium-severity vulnerability in open-telemetry opentelemetry-dotnet-contrib
OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.2%
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.
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-contribRelated CVEs — open-telemetry opentelemetry-dotnet-contrib
In the same product, most dangerous first.
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