GHSA-88hf-wf7h-7w4m: OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure
Summary
OpenTelemetry's Zipkin exporter had a bug where its remote endpoint cache (a storage area for tracking where data is sent) could grow infinitely in high-cardinality scenarios (situations with many unique values), causing the application to use more and more memory over time. This could make the application slower or crash.
Solution / Mitigation
Introduce a bounded, thread-safe LRU cache (a cache that automatically removes the least recently used items when full) for remote endpoints and enforce a fixed maximum size to prevent unbounded growth. See PR #7081 in the opentelemetry-dotnet repository for the fix.
Vulnerability Details
EPSS: 0.0%
Yes
April 28, 2026
Classification
Affected Vendors
Affected Packages
Related Issues
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Original source: https://github.com/advisories/GHSA-88hf-wf7h-7w4m
First tracked: April 28, 2026 at 08:00 PM
Classified by LLM (prompt v3) · confidence: 72%