Memory Allocation with Excessive Size Value

Overview OpenTelemetry.Extensions.Propagators is a package containing propagator formats for OpenTelemetry .NET. Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the processing of propagation headers such as baggage, B3, and Jaeger. An attacker ca...

OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling

Summary 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...

EUVD-2026-25268

OpenTelemetry dotnet: Unbounded grpc-status-details-bin parsing in OTLP/gRPC retry handling...

OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies

Summary When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format OTLP, if the request results in a unsuccessful request i.e. HTTP 4xx or 5xx, the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory...

CVE-2026-40894

OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators...

CVE-2026-41173

OpenTelemetry.Sampler.AWS is affected by an unbounded HTTP response body read in the AWS X-Ray remote sampler prior to 0.1.0-alpha.8. The AWSXRaySamplerClient.DoRequestAsync call reads the entire HTTP response into memory (ReadAsStringAsync) without size limits, enabling an attacker controlling o...

CVE-2026-41173 Unbounded HTTP response body read in OpenTelemetry.Sampler.AWS

The AWS X-Ray Remote Sampler package provides a sampler which can get sampling configurations from AWS X-Ray. Prior to 0.1.0-alpha.8, OpenTelemetry.Sampler.AWS reads unbounded HTTP response bodies from a configured AWS X-Ray remote sampling endpoint into memory. AWSXRaySamplerClient.DoRequestAsyn...

CVE-2026-40182

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format OTLP, if the request results in a unsuccessful request i.e. HTTP 4xx or 5xx, the response is read into memory...

CVE-2026-40891

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...

CVE-2026-41078 OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path

OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure when the internal pooled-list sizing grows based on a large observed span/tag set and that enlarged size is reused for subsequent allocations. Under...

CVE-2026-40891

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...

CVE-2026-40891 OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling

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...

CVE-2026-40891

OpenTelemetry dotnet (OpenTelemetry .NET telemetry framework) contains a vulnerability in versions 1.13.1 through before 1.15.2. During OTLP/gRPC export, the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. A malformed trailer could encode a very large l...

CVE-2026-40182

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format OTLP, if the request results in a unsuccessful request i.e. HTTP 4xx or 5xx, the response is read into memory...

CVE-2026-40182 OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format OTLP, if the request results in a unsuccessful request i.e. HTTP 4xx or 5xx, the response is read into memory...

OpenC3 COSMOS has SQL Injection in QuestDB Time-Series Database

Vulnerability Type: CWE-89: Improper Neutralization of Special Elements used in an SQL Command 'SQL Injection' Attack type: Authenticated remote Impact: Telemetry data disclosure and deletion Affected components: openc3-tsdb QuestDB A SQL injection vulnerability exists in the Time-Series Database...

GHSA-V529-VHWC-WFC5 OpenC3 COSMOS has SQL Injection in QuestDB Time-Series Database

Vulnerability Type: CWE-89: Improper Neutralization of Special Elements used in an SQL Command 'SQL Injection' Attack type: Authenticated remote Impact: Telemetry data disclosure and deletion Affected components: openc3-tsdb QuestDB A SQL injection vulnerability exists in the Time-Series Database...

OpenC3 COSMOS has SQL Injection in QuestDB Time-Series Database

Vulnerability Type: CWE-89: Improper Neutralization of Special Elements used in an SQL Command 'SQL Injection' Attack type: Authenticated remote Impact: Telemetry data disclosure and deletion Affected components: openc3-tsdb QuestDB A SQL injection vulnerability exists in the Time-Series Database...

PT-2026-34720

Name of the Vulnerable Software and Affected Versions OpenTelemetry.Api versions 0.5.0-beta.2 through 1.15.2 OpenTelemetry.Extensions.Propagators versions 1.3.1 through 1.15.2 Description Implementation details of the baggage, B3, and Jaeger processing code in the OpenTelemetry.Api and...

PT-2026-34708

Name of the Vulnerable Software and Affected Versions OpenTelemetry dotnet versions 1.13.1 through 1.15.1 Description 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. A...