CVE-2026-40891
Medium · 5.3CVSS
5.3
EPSS
0.3%
Published
Apr 23, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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