CVE-2026-40891
Published: Apr 23, 2026
Modified: Apr 23, 2026
CVSS v3.1
5.3
Description
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
| Vendor | Product | Versions |
|---|---|---|
open-telemetry | opentelemetry-dotnet | affected >= 1.13.1, < 1.15.3 |
open-telemetry | OpenTelemetry.Exporter.OpenTelemetryProtocol | affected >= 1.13.1, < 1.15.3 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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