Vulnerability in Open-telemetry Opentelemetry-dotnet
CVE-2026-40891
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during…
EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Open-telemetry Opentelemetry-dotnet — versions >= 1.13.1, < 1.15.3
- Open-telemetry Opentelemetry.exporter.opentelemetryprotocol — versions >= 1.13.1, < 1.15.3
- Opentelemetry
Weakness classification (CWE)
References
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-mr8r-92fq-pj8p (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980 (Patch, x_refsource_MISC, Issue Tracking)
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064 (Patch, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2026-40891?
- CVE-2026-40891 is a medium-severity vulnerability in Open-telemetry Opentelemetry-dotnet, classified under CWE-789. CVSS score: 5.3/10. Published 2026-04-23.
- How severe is CVE-2026-40891?
- Medium severity. CVSS v3 base score is 5.3 out of 10.