CVE-2026-81870Low· 2.0▾ TwilightPoC availableOpenTelemetry-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 includ…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 11 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
Exploit / PoC code exists
0.2%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
go.opentelemetry.io/otel/sdk >= 1.5.0, <= 1.44.0go.opentelemetry.io/otel/exporters/otlp/otlptrace >= 1.5.0, <= 1.44.0go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc >= 1.5.0, <= 1.44.0go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp >= 1.5.0, <= 1.44.0go.opentelemetry.io/otel/exporters/zipkin >= 1.5.0, <= 1.44.0Patched in:
go.opentelemetry.io/otel/sdk 1.45.0go.opentelemetry.io/otel/exporters/otlp/otlptrace 1.45.0go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc 1.45.0go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp 1.45.0go.opentelemetry.io/otel/exporters/zipkin 1.45.0Source: https://github.com/advisories/GHSA-8wmf-6v46-5gfg
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-81871Medium· 6.3OpenTelemetry-Go is the Go implementation of OpenTelemetry
CVE-2026-81872Medium· 6.3OpenTelemetry-Go is the Go implementation of OpenTelemetry
CVE-2026-81869Medium· 5.1OpenTelemetry-Go is the Go implementation of OpenTelemetry
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CVE-2026-47256Medium· 5.3OpenTelemetry, also known as OTel, is a vendor-neutral open source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, and logs
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