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CVE-2026-40894

5.3 · MEDIUM

OpenTelemetry dotnet is a dotnet telemetry framework.

Published Apr 23, 2026CWE-789EPSS 0.57%

Overview

CVE-2026-40894 is a medium-severity vulnerability. It was published on April 23, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/open-telemetry/opentelemetry-dotnet/pull/1048GitHubgithub.com/open-telemetry/opentelemetry-dotnet/pull/3244GitHubgithub.com/open-telemetry/opentelemetry-dotnet/pull/3309GitHubgithub.com/open-telemetry/opentelemetry-dotnet/pull/533GitHubgithub.com/open-telemetry/opentelemetry-dotnet/pull/7061GitHubgithub.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40894?

CVE-2026-40894 is a medium-severity vulnerability. It was published on April 23, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-40894?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-40894?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-40894?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40894 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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