GHSA-88hf-wf7h-7w4m (CVE-2026-41310)

Details

Summary

The Zipkin exporter remote endpoint cache accepted unbounded key growth derived from span attributes. In high-cardinality scenarios, this could increase process memory usage over time and degrade availability.

Details

Introduce a bounded, thread-safe LRU cache for remote endpoints.
Enforce fixed maximum size to prevent unbounded growth.

Impact

A process using Zipkin export for client/producer spans could experience avoidable memory growth under sustained unique remote endpoint values.

Resources

#7081

Affected Packages

OpenTelemetry.Exporter.Zipkin

NuGet

Fixed in:

1.15.3

References

ADVISORY

https://github.com/advisories/GHSA-88hf-wf7h-7w4m

PACKAGE

https://github.com/open-telemetry/opentelemetry-dotnet

WEB

https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62

WEB

https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081

WEB

https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m