Vulnerability in Open-telemetry Opentelemetry.api
CVE-2026-40894
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 Ope…
EPSS: 0.000 (8.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Open-telemetry Opentelemetry.api — versions >= 0.5.0-beta.2, < 1.15.3
- Open-telemetry Opentelemetry-dotnet — versions >= 0.5.0-beta.2, < 1.15.3
- Open-telemetry Opentelemetry.extensions.propagators — versions >= 1.3.1, < 1.15.3
- Opentelemetry
- Opentelemetry Opentelemetry.api
- Opentelemetry Opentelemetry.extensions.propagators
Weakness classification (CWE)
References
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048 (Patch, x_refsource_MISC, Issue Tracking)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244 (Patch, x_refsource_MISC, Issue Tracking)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309 (Patch, x_refsource_MISC, Issue Tracking)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/533 (Patch, x_refsource_MISC, Issue Tracking)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061 (Patch, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2026-40894?
- CVE-2026-40894 is a medium-severity vulnerability in Open-telemetry Opentelemetry.api, classified under CWE-789. CVSS score: 5.3/10. Published 2026-04-23.
- How severe is CVE-2026-40894?
- Medium severity. CVSS v3 base score is 5.3 out of 10.