Description
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.
Published: 2026-05-26
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-wfr5-454p-mjc2 OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured
History

Wed, 27 May 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 26 May 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-dotnet-contrib
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-dotnet-contrib

Tue, 26 May 2026 21:45:00 +0000

Type Values Removed Values Added
Description 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.
Title OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

Opentelemetry Opentelemetry-dotnet-contrib
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-27T15:51:25.352Z

Reserved: 2026-05-05T15:13:47.572Z

Link: CVE-2026-44213

cve-icon Vulnrichment

Updated: 2026-05-27T15:50:08.669Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-26T22:16:42.443

Modified: 2026-06-17T10:50:21.993

Link: CVE-2026-44213

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-26T22:30:18Z

Weaknesses