open-telemetry/opentelemetry-dotnet · Security
OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure
- GHSA ID
- GHSA-88hf-wf7h-7w4m
- CVE ID
- CVE-2026-41310
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Description
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
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- 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 ↗
- https://github.com/advisories/GHSA-88hf-wf7h-7w4m ↗