VYPR
Medium severity5.3NVD Advisory· Published Apr 23, 2026· Updated Apr 29, 2026

CVE-2026-40891

CVE-2026-40891

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
OpenTelemetry.Exporter.OpenTelemetryProtocolNuGet
>= 1.13.1, < 1.15.31.15.3

Affected products

5

Patches

Vulnerability mechanics

References

5

News mentions

0

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