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CVE-2026-41310— OpenTelemetry .NET Zipkin exporter has unbounded remote endpoint cache leading to memory growth

Quick assessment

Affected
open-telemetry opentelemetry-dotnet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenTelemetry是OpenTelemetry开源的一个供应商中立的开源可观测性框架。 OpenTelemetry 1.15.2及之前版本存在资源管理错误漏洞，该漏洞源于Zipkin导出器远程端点缓存接受来自span属性的无界键增长，可能导致进程内存使用量增加并降低可用性。

CVSS 5.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-telemetry opentelemetry-dotnet <= 1.15.2 affected
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I. Basic Information for CVE-2026-41310

Vulnerability Information
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Vulnerability Title
OpenTelemetry .NET Zipkin exporter has unbounded remote endpoint cache leading to memory growth
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry是OpenTelemetry开源的一个供应商中立的开源可观测性框架。 OpenTelemetry 1.15.2及之前版本存在资源管理错误漏洞，该漏洞源于Zipkin导出器远程端点缓存接受来自span属性的无界键增长，可能导致进程内存使用量增加并降低可用性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry opentelemetry-dotnet <= 1.15.2 -

II. Public POCs for CVE-2026-41310

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III. Intelligence Information for CVE-2026-41310

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Patches & Fixes for CVE-2026-41310 (1)

Vendor Advisories for CVE-2026-41310 (1)

Same Patch Batch · open-telemetry · 2026-05-06 · 3 CVEs total

CVE-2026-41483 5.9 MEDIUM Unbounded HTTP response body read in OpenTelemetry.Resources.Azure
CVE-2026-41484 5.3 MEDIUM OpenTelemetry.Exporter.OneCollector vulnerable to denial of service via unbounded HTTP err

IV. Related Vulnerabilities

Same product: opentelemetry-dotnet
Same vendor: open-telemetry
Same weakness: CWE-770

V. Comments for CVE-2026-41310

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