# CVE-2026-40182

> Vulnerability · severity: **MEDIUM** (CVSS 5.3).

## Description

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.

## Key facts

- **CVE ID:** CVE-2026-40182
- **Published:** 2026-04-23
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.3
- **CWE codes:** CWE-789

## Affected products

- `opentelemetry:opentelemetry`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40182

## Citation

> AI Analytics. CVE-2026-40182. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-40182. Derived from NIST NVD. Licensed CC0.

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