medium5.3
CVE-2026-41310
OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure
Impact
OpenTelemetry.Exporter.Zipkin is the .NET Zipkin exporter for OpenTelemetry. In versions 1.15.2 and earlier, the Zipkin exporter remote endpoint cache accepts unbounded key growth derived from span attributes. In high-cardinality scenarios, a process using Zipkin export for client or producer spans could experience avoidable memory growth under sustained unique remote endpoint values, increasing process memory usage over time and degrading availability. This issue is fixed in version 1.15.3, which introduces a bounded, thread-safe LRU cache for remote endpoints with a fixed maximum size.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | OpenTelemetry.Exporter.Zipkin | <= 1.15.2 | 1.15.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Opentelemetry | Opentelemetry.Exporter.Zipkin | before 1.15.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-88hf-wf7h-7w4m
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081
- https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62
- https://nvd.nist.gov/vuln/detail/CVE-2026-41310