Vulnerability Description
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.5.0 to 1.44.0, sdk/trace.NewTracerProvider emits a TracerProvider created internal Info-level diagnostic event whose MarshalLog implementations recursively include span processor, exporter, and client configuration. Applications that call otel.SetLogger to enable OpenTelemetry internal Info logging can therefore record OTLP gRPC and HTTP collector endpoints, the OTLP HTTP Insecure flag, and complete Zipkin collector URLs. A person or system with access to those logs can learn internal collector topology and can recover credentials or tokens embedded in Zipkin URL user information or query strings. The default OpenTelemetry logger does not emit the event, and this path does not log OTLP authentication headers, TLS key material, or span payloads. This issue is fixed in version 1.45.0.
Related Weaknesses (CWE)
References
- https://github.com/open-telemetry/opentelemetry-go/commit/3a1412d2b3bc4e4231fbea
- https://github.com/open-telemetry/opentelemetry-go/pull/8438
- https://github.com/open-telemetry/opentelemetry-go/releases/tag/exporters/zipkin
- https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/v1.45.0
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-8wmf
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-8wmf
FAQ
What is CVE-2026-81870?
CVE-2026-81870 is a documented vulnerability. OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.5.0 to 1.44.0, sdk/trace.NewTracerProvider emits a TracerProvider created internal Info-level diagnostic event whose MarshalL...
How severe is CVE-2026-81870?
CVSS scoring is not yet available for CVE-2026-81870. Check NVD for updates.
Is there a patch for CVE-2026-81870?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.