GHSA-88hf-wf7h-7w4m
OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| NuGet | OpenTelemetry.Exporter.Zipkin | < 1.15.3 | 1.15.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m
- https://nvd.nist.gov/vuln/detail/CVE-2026-41310
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081
- https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62
- https://github.com/open-telemetry/opentelemetry-dotnet