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CVE-2026-41310 — Vulnerability in OpenTelemetry.Exporter.Zipkin —...

MEDIUM

OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure

Published April 28, 2026Updated May 8, 2026Source: osv

Summary

### 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)

Advisory Timeline

  • First published April 28, 2026 (166 days ago).
  • Last revised May 8, 2026 — 10 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update OpenTelemetry.Exporter.Zipkin to 1.15.3 or later
dotnet add package OpenTelemetry.Exporter.Zipkin --version 1.15.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
OpenTelemetry.Exporter.Zipkin
nuget
1.0.0-rc2, 1.0.0-rc3, 1.0.0-rc4, 1.0.1 (+38 more)1.15.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-400
    Uncontrolled Resource ConsumptionMITRE
  • CWE-770
    Allocation of Resources Without LimitsMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.3 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Frequently Asked Questions

What is CVE-2026-41310?
OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.3/10).
How do I check if my project is affected by CVE-2026-41310?
CVE-2026-41310 affects OpenTelemetry.Exporter.Zipkin. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-41310 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
5.3

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-88hf-wf7h-7w4m

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