OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies_CVE-2026-40182

{
    "lastseen": "",
    "description": "OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.",
    "published": "2026-04-23T17:51:34.961Z",
    "modified": "2026-04-23T18:38:57.155Z",
    "type": "cve",
    "title": "OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies",
    "source": "GitHub_M",
    "references": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/6564\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/7017\nhttps://github.com/open-telemetry/opentelemetry-proto/pull/781",
    "id": "CVE-2026-40182",
    "bulletinFamily": "",
    "cwe": [
        "CWE-789"
    ],
    "cvelist": null,
    "sourceData": "open-telemetry opentelemetry-dotnet >= 1.13.1, < 1.15.2",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "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",
    "version": ">= 1.13.1, < 1.15.2",
    "vendor": "open-telemetry",
    "ai_description": "",
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    "ai_score": 0
}