Memory Allocation with Excessive Size Value Affecting opentelemetry.exporter.opentelemetryprotocol package, versions [1.13.1,1.15.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-OPENTELEMETRYEXPORTEROPENTELEMETRYPROTOCOL-16189067
- published24 Apr 2026
- disclosed24 Apr 2026
- creditPiotr Kiełkowicz
Introduced: 24 Apr 2026
NewCVE-2026-40891 (opens in a new tab)How to fix?
Upgrade OpenTelemetry.Exporter.OpenTelemetryProtocol to version 1.15.3 or higher.
Overview
OpenTelemetry.Exporter.OpenTelemetryProtocol is an OTLP Exporter for OpenTelemetry .NET.
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the grpc-status-details-bin parsing process during OTLP/gRPC retry handling. An attacker can cause excessive memory allocation and disrupt service availability by sending a malformed trailer with an extremely large length-delimited protobuf field.