OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40182
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:54 UTC · Revision 1
Source evidence
OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
core-osv · Original sourcePublished 23 Apr 2026, 17:51 UTC
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.
osv:CVE-2026-40182
Complete source record
{
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"url": "https://osv.dev/vulnerability/CVE-2026-40182",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies",
"summary": "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.",
"evidence": "osv:CVE-2026-40182",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40182.json"
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],
"modified": "2026-10-28T02:30:42.080689014Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40182.json",
"https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933",
"https://nvd.nist.gov/vuln/detail/CVE-2026-40182",
"https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564",
"https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017",
"https://github.com/open-telemetry/opentelemetry-proto/pull/781"
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"provider_metadata": {
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"cna_assigner": "GitHub_M",
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"source_id": "core-osv",
"document_id": 510038,
"published_at": "2026-04-23T17:51:34.961+00:00"
}