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EUVD-2026-220604

2026-10-16T06:27:45.808685+00:00

EUVD-2026-220604

fkie_cve-2025-27513

2026-10-16T06:27:45.808720+00:00

OpenTelemetry dotnet is a dotnet telemetry framework. A vulnerability in OpenTelemetry.Api package 1.10.0 to 1.11.1 could cause a Denial of Service (DoS) when a tracestate and traceparent header is received. Even if an application does not explicitly use trace context propagation, receiving these headers can still trigger high CPU usage. This issue impacts any application accessible over the web or backend services that process HTTP requests containing a tracestate header. Application may experience excessive resource consumption, leading to increased latency, degraded performance, or downtime. This vulnerability is fixed in 1.11.2.

GHSA-8785-wc3w-h8q6 — OpenTelemetry .NET has Denial of Service (DoS) Vulnerability in API Package

2026-10-16T06:27:45.808754+00:00

Affected: NuGet: OpenTelemetry.Api

### Impact _What kind of vulnerability is it? Who is impacted?_

A vulnerability in `OpenTelemetry.Api` package `1.10.0` to `1.11.1` could cause a Denial of Service (DoS) when a `tracestate` and `traceparent` header is received.

* Even if an application does not explicitly use trace context propagation, receiving these headers can still trigger high CPU usage. * This issue impacts any application accessible over the web or backend services that process HTTP requests containing a `tracestate` header. * Application may experience excessive resource consumption, leading to increased latency, degraded performance, or downtime.

### Patches _Has the problem been patched? What versions should users upgrade to?_

This issue has been resolved in OpenTelemetry.Api 1.11.2 by reverting the change that introduced the problematic behavior in versions 1.10.0 to 1.11.1.

The fix ensures that valid tracing headers no longer cause excessive CPU consumption when received in requests.

Fixed Version:

**Upgrade Command:**…