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CVE-2025-27513— OpenTelemetry .NET has a Denial of Service (DoS) Vulnerability in API Package

Quick assessment

Affected
open-telemetry opentelemetry-dotnet
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenTelemetry .NET是OpenTelemetry公司的OpenTelemetry的.NET客户端。 OpenTelemetry .NET 1.10.0至1.11.1版本存在安全漏洞，该漏洞源于处理标头不当，导致拒绝服务攻击。

CVSS 7.5 · High EPSS 0.51% · P41
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I. Basic Information for CVE-2025-27513

Vulnerability Information
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Vulnerability Title
OpenTelemetry .NET has a Denial of Service (DoS) Vulnerability in API Package
Source: CVE Program / CVE List V5
Vulnerability Description
OpenTelemetry dotnet is a dotnet telemetry framework. A vulnerability in OpenTelemetry.Api package 1.10.0 to 1.11.1 could cause a Denial of Service (DoS) when a tracestate and traceparent header is received. Even if an application does not explicitly use trace context propagation, receiving these headers can still trigger high CPU usage. This issue impacts any application accessible over the web or backend services that process HTTP requests containing a tracestate header. Application may experience excessive resource consumption, leading to increased latency, degraded performance, or downtime. This vulnerability is fixed in 1.11.2.
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:H
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 .NET 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry .NET是OpenTelemetry公司的OpenTelemetry的.NET客户端。 OpenTelemetry .NET 1.10.0至1.11.1版本存在安全漏洞，该漏洞源于处理标头不当，导致拒绝服务攻击。
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 >= 1.10.0-beta.1, < 1.11.2 -

II. Public POCs for CVE-2025-27513

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7534 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2025-27513

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Patches & Fixes for CVE-2025-27513 (1)

Vendor Advisories for CVE-2025-27513 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2025-27513

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