Is OpenTelemetry.Exporter.OpenTelemetryProtocol affected by CVE-2026-40891?

NuGet OpenTelemetry.Exporter.OpenTelemetryProtocol is affected in >=1.13.1 <1.15.3.

Is CVE-2026-40891 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-40891

Q: Is CVE-2026-40891 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

NuGet · OpenTelemetry.Exporter.OpenTelemetryProtocol

Summary

OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling

Severity: medium
EPSS: 0.2% (p9)
Also known as: GHSA-mr8r-92fq-pj8p
Published: 2026-04-23

References

https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-mr8r-92fq-pj8p
https://nvd.nist.gov/vuln/detail/CVE-2026-40891
https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980

Related advisories

CVE-2026-42191 — medium · NuGet/OpenTelemetry.Exporter.OpenTelemetryProtocol
CVE-2026-40182 — medium · NuGet/OpenTelemetry.Exporter.OpenTelemetryProtocol

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.