Vulnerability Description
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer while the exporter is backpressured. NewBatchingProcessor wraps the exporter with newBufferExporter(exporter, 1), and the poll loop calls queue.TryDequeue and bufferExporter.EnqueueExport before immediately signaling pollTrigger whenever the queue remains at or above batchSize. Because a failed nonblocking EnqueueExport leaves the queue length unchanged, the processor repeatedly retries without waiting for its ticker, exhausting CPU and degrading or denying service in the embedding process. This issue is fixed in version 0.21.0.
Related Weaknesses (CWE)
References
- https://github.com/open-telemetry/opentelemetry-go/commit/ba71b09e6ed272e93a669a
- https://github.com/open-telemetry/opentelemetry-go/issues/6797
- https://github.com/open-telemetry/opentelemetry-go/pull/8620
- https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/log/v0.21.0
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4
FAQ
What is CVE-2026-81872?
CVE-2026-81872 is a documented vulnerability. OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission...
How severe is CVE-2026-81872?
CVSS scoring is not yet available for CVE-2026-81872. Check NVD for updates.
Is there a patch for CVE-2026-81872?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.