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 NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.

The following products are affected by CVE-2026-40894 vulnerability.

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Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40894.

URL	Resource
https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309
https://github.com/open-telemetry/opentelemetry-dotnet/pull/533
https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061
https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j