OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

5.3 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

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.

Basic Information

ID CVE-2026-40894

Source GitHub_M

Published Apr 23, 2026 at 18:03

Modified Apr 23, 2026 at 19:22

Affected Product

Vendor open-telemetry

Product opentelemetry-dotnet

Version >= 0.5.0-beta.2, < 1.15.3

Affected Versions open-telemetry opentelemetry-dotnet >= 0.5.0-beta.2, < 1.15.3
open-telemetry OpenTelemetry.Api >= 0.5.0-beta.2, < 1.15.3
open-telemetry OpenTelemetry.Extensions.Propagators >= 1.3.1, < 1.15.3

CWE Classification

CWE-789

References

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    "published": "2026-04-23T18:03:28.211Z",
    "modified": "2026-04-23T19:22:47.268Z",
    "type": "cve",
    "title": "OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers",
    "source": "GitHub_M",
    "references": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/1048\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/3244\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/3309\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/533\nhttps://github.com/open-telemetry/opentelemetry-dotnet/pull/7061",
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OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers_CVE-2026-40894