CVE-2026-40182 · Severity: medium · CVSS 5.3 · Published 2026-04-23
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.
Yes. OpenTelemetry.Exporter.OpenTelemetryProtocol (NuGet): upgrade to 1.15.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-40182?
Check whether you run OpenTelemetry.Exporter.OpenTelemetryProtocol (NuGet) or Opentelemetry at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
OpenTelemetry.Exporter.OpenTelemetryProtocol (NuGet): upgrade to 1.15.2 or later