CVE-2026-41310
mediumpriority · track · 0EPSS 0.003 · 24 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
- opentelemetry opentelemetry.exporter.zipkin< 1.15.3nvdUScpe:2.3:a:opentelemetry:opentelemetry.exporter.zipkin:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-88hf-wf7h-7w4mOpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure2026-04-28ghsa · osvUS
### 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)
also known as (3)
Other names and identifiers for this entity.
sources
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references (6)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2026-41310cnnvd
- https://opentelemetry.io/Patchcnnvd
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081enisa_euvd
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4menisa_euvd
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081Issue Trackingnvd
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4mVendor Advisorynvd
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