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CVE-2026-81870GHSA-8WMF-6V46-5GFGGO-2026-6505

OpenTelemetry-Go: Exporter config logging may leak endpoint URLs in info logs

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.45.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • open-telemetry opentelemetry-go

    From 1.5.0 · fixed in 1.45.0

  • go.opentelemetry.io/otel/sdkGo

    From 1.5.0 · fixed in 1.45.0

  • go.opentelemetry.io/otel/exporters/otlp/otlptraceGo

    From 1.5.0 · fixed in 1.45.0

  • go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpcGo

    From 1.5.0 · fixed in 1.45.0

  • go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttpGo

    From 1.5.0 · fixed in 1.45.0

  • go.opentelemetry.io/otel/exporters/zipkinGo

    From 1.5.0 · fixed in 1.45.0

References 5

GitHub · open-telemetry/opentelemetry-go