CVE-2026-42348— OpAMP client reads unbounded HTTP response bodies
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet-contrib | < 0.2.0-alpha.1 | affected |
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I. Basic Information for CVE-2026-42348
Vulnerability Information
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Vulnerability Title
OpAMP client reads unbounded HTTP response bodies
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenTelemetry.OpAmp.Client is the OpAMP client for OpenTelemetry .NET. Prior to 0.2.0-alpha.1, when receiving responses from the OpAMP server over HTTP, the OpAMP client allocates an unbounded buffer to read all bytes from the server, with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured OpAMP server is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned in the response. This vulnerability is fixed in 0.2.0-alpha.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenTelemetry .NET Contrib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry .NET Contrib是OpenTelemetry - CNCF开源的一个开源遥测数据收集与处理工具库。 OpenTelemetry .NET Contrib 0.2.0-alpha.1之前版本存在安全漏洞，该漏洞源于通过HTTP接收OpAMP服务器响应时分配无界缓冲区读取所有字节，可能导致内存耗尽。
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-contrib | < 0.2.0-alpha.1 | - |
II. Public POCs for CVE-2026-42348
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2026-42348
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