CVE-2026-40182

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.

The following products are affected by CVE-2026-40182 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40182.

URL	Resource
https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564
https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017
https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933
https://github.com/open-telemetry/opentelemetry-proto/pull/781