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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-g94r-2vxg-569j OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 28 Apr 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Opentelemetry opentelemetry
CPEs cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*
cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*
Vendors & Products Opentelemetry opentelemetry

Tue, 28 Apr 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-dotnet
Opentelemetry opentelemetry.api
Opentelemetry opentelemetry.extensions.propagators
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-dotnet
Opentelemetry opentelemetry.api
Opentelemetry opentelemetry.extensions.propagators

Thu, 23 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 23 Apr 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-23T19:22:47.268Z

Reserved: 2026-04-15T16:37:22.766Z

Link: CVE-2026-40894

cve-icon Vulnrichment

Updated: 2026-04-23T19:22:42.774Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-23T19:17:28.810

Modified: 2026-04-28T19:34:26.253

Link: CVE-2026-40894

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-28T15:00:14Z

Weaknesses