CVE-2026-44213
OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-295 |
| Vendor | open-telemetry |
| Product | opentelemetry-dotnet-contrib |
| Published | May 26, 2026 |
| Last Updated | May 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
open-telemetry / opentelemetry-dotnet-contrib
< 1.1.0