OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured_CVE-2026-44213

{
    "lastseen": "",
    "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": "2026-05-26T21:34:27.762Z",
    "modified": "2026-05-26T21:34:27.762Z",
    "type": "cve",
    "title": "OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured",
    "source": "GitHub_M",
    "references": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-wfr5-454p-mjc2",
    "id": "CVE-2026-44213",
    "bulletinFamily": "",
    "cwe": [
        "CWE-295"
    ],
    "cvelist": null,
    "sourceData": "open-telemetry opentelemetry-dotnet-contrib < 1.1.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
            "baseSeverity": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "opentelemetry-dotnet-contrib",
    "version": "< 1.1.0",
    "vendor": "open-telemetry",
    "ai_description": "",
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    "ai_score": 0
}