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.
Affected products
opentelemetry: opentelemetry
References3
- github.com/open-telemetry/opentelemetry-dotnet/security/advisor… MitigationVendor Advisory
- github.com/open-telemetry/opentelemetry-dotnet/pull/5980 Issue TrackingPatch
- github.com/open-telemetry/opentelemetry-dotnet/pull/7064 Issue TrackingPatch
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: NVD
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 9 · as of 13 November 2026
- CWE
- CWE-789
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