# OpenTelemetry.Api (NuGet) vulnerabilities

2 known vulnerabilities (1 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://www.nuget.org/packages/OpenTelemetry.Api

## Advisories (2)

### [CVE-2026-40894](https://cve.now/CVE-2026-40894): OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

- Severity: Medium 5.3
- Published: Apr 23, 2026
- Affected: from 0.5.0-beta.2, fixed in 1.15.3.

### [CVE-2025-27513](https://cve.now/CVE-2025-27513): OpenTelemetry .NET has a Denial of Service (DoS) Vulnerability in API Package

- Severity: High 7.5
- Published: Mar 5, 2025
- Affected: from 1.11.0, fixed in 1.11.2; versions 1.10.0; versions 1.10.0-beta.1; versions 1.10.0-rc.1; versions 1.11.0-rc.1.

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