Vulnerabilities in pkg:nuget/OpenTelemetry.Exporter.Zipkin

PACKAGE
Advisory Identifier: GHSA-88hf-wf7h-7w4m
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Advisory Summary

CVE-2026-41310 is a MODERATE (CVSS 5.3) opentelemetry's zipkin remote endpoint cache vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting OpenTelemetry.Exporter.Zipkin libraries in the NuGet ecosystem. The issue involves opentelemetry's zipkin remote endpoint cache could grow without bounds and increase memory pressure. Remediation is available by upgrading affected packages to version 1.15.3.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:nuget/OpenTelemetry.Exporter.Zipkin

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:nuget/OpenTelemetry.Exporter.Zipkin. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-88hf-wf7h-7w4m CVE-2026-41310 MODERATE OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure

CVE-2026-41310 at a Glance

CVE Identifier CVE-2026-41310
GHSA Identifier GHSA-88hf-wf7h-7w4m
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product OpenTelemetry.Exporter.Zipkin
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-41310

To remediate this vulnerability, upgrade all affected OpenTelemetry.Exporter.Zipkin dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

OpenTelemetry.Exporter.Zipkin fixed: 1.15.3 
Upgrade OpenTelemetry.Exporter.Zipkin to 1.15.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for OpenTelemetry.Exporter.Zipkin

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-41310, inspect your project dependencies for OpenTelemetry.Exporter.Zipkin:

inspect dependencies for OpenTelemetry.Exporter.Zipkin

Analyze the terminal output to locate any version of OpenTelemetry.Exporter.Zipkin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.15.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In OpenTelemetry.Exporter.Zipkin, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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)

CVE-2026-41310 Affected OpenTelemetry.Exporter.Zipkin Versions

1 component(s)
Fixed Versions:
1.15.3
Product / Package Ecosystem Affected Versions Fixed Version
OpenTelemetry.Exporter.Zipkin
nuget/OpenTelemetry.Exporter.Zipkin
NuGet
< 1.15.3
1.15.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m
NVD — CVE-2026-41310 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41310
OpenTelemetry.Exporter.Zipkin Source Repository REPOSITORY
https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081
Security Fix Commit FIX COMMIT
https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62
OpenTelemetry.Exporter.Zipkin Source Repository REPOSITORY
https://github.com/open-telemetry/opentelemetry-dotnet

Frequently Asked Questions

What is CVE-2026-41310?
CVE-2026-41310 is a security vulnerability in OpenTelemetry.Exporter.Zipkin involving OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure under CWE-400: Uncontrolled Resource Consumption.
Which OpenTelemetry.Exporter.Zipkin versions are affected?
Affected versions include releases prior to 1.15.3 across affected packages: OpenTelemetry.Exporter.Zipkin.
What version fixes CVE-2026-41310?
Upgrading to 1.15.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is OpenTelemetry.Exporter.Zipkin affected?
Yes, OpenTelemetry.Exporter.Zipkin is affected in releases prior to 1.15.3. Upgrade your dependency to 1.15.3 or later.
What is the CVSS score of CVE-2026-41310?
CVE-2026-41310 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-41310?
CVE-2026-41310 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check NuGet dependencies for CVE-2026-41310?
Run the dependency tree command: 'inspect dependencies for OpenTelemetry.Exporter.Zipkin'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-88hf-wf7h-7w4m",
  "modified" : "2026-05-08T19:32:38Z",
  "published" : "2026-04-28T23:23:28Z",
  "aliases" : [ "CVE-2026-41310" ],
  "summary" : "OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure",
  "details" : "### Summary\n\nThe 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.\n\n### Details\n\n- Introduce a bounded, thread-safe LRU cache for remote endpoints.\n- Enforce fixed maximum size to prevent unbounded growth.\n\n### Impact\n\n- A process using Zipkin export for client/producer spans could experience avoidable memory growth under sustained unique remote endpoint values.\n\n### Resources\n\n[#7081](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "OpenTelemetry.Exporter.Zipkin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.15.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.15.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41310"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/open-telemetry/opentelemetry-dotnet"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-28T23:23:28Z",
    "nvd_published_at" : "2026-05-06T22:16:25Z"
  }
}