CVE-2026-41484— OpenTelemetry.Exporter.OneCollector vulnerable to denial of service via unbounded HTTP error response body

OpenTelemetry.Exporter.OneCollector vulnerable to denial of service via unbounded HTTP error response body

OpenTelemetry.Exporter.OneCollector is a .NET exporter that sends telemetry to a OneCollector back-end over HTTP. In versions 1.15.0 and earlier, when a request to the configured back-end or collector results in an unsuccessful HTTP 4xx or 5xx response, the HttpJsonPostTransport class reads the entire response body into memory with no upper bound on the number of bytes consumed in order to include the error response in operator logs. An attacker who controls the configured endpoint, or who can intercept traffic to it via a man-in-the-middle attack, can return an arbitrarily large response body. This causes unbounded heap allocation in the consuming process, leading to high transient memory pressure, garbage-collection stalls, or an OutOfMemoryException that terminates the process. As a workaround, use network-level controls such as firewall rules, mTLS, or a service mesh to prevent man-in-the-middle attacks on the configured back-end or collector endpoint. This issue is fixed in version 1.15.1, which limits the number of bytes read from the response body in an error condition to 4 MiB.

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

不加限制或调节的资源分配

OpenTelemetry .NET Contrib 安全漏洞

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 1.15.0及之前版本存在安全漏洞，该漏洞源于HttpJsonPostTransport类在读取错误响应体时无大小限制，可能导致堆分配无界增长，引发高内存压力或进程终止。

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