Description
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.
Published: 2026-05-06
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-88hf-wf7h-7w4m OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure
History

Mon, 11 May 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Opentelemetry opentelemetry.exporter.zipkin
CPEs cpe:2.3:a:opentelemetry:opentelemetry.exporter.zipkin:*:*:*:*:*:.net:*:*
Vendors & Products Opentelemetry opentelemetry.exporter.zipkin

Thu, 07 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 06 May 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-dotnet
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-dotnet

Wed, 06 May 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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.
Title OpenTelemetry .NET Zipkin exporter has unbounded remote endpoint cache leading to memory growth
Weaknesses CWE-400
CWE-770
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

Opentelemetry Opentelemetry-dotnet Opentelemetry.exporter.zipkin
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-07T13:19:12.396Z

Reserved: 2026-04-20T14:01:46.670Z

Link: CVE-2026-41310

cve-icon Vulnrichment

Updated: 2026-05-07T13:18:52.744Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-06T22:16:25.643

Modified: 2026-05-11T14:40:45.183

Link: CVE-2026-41310

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T22:45:13Z

Weaknesses