opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
CVE-2026-44967

5.3MEDIUM

Key Information:

Vendor: Open-telemetry
Status: Opentelemetry-cpp
Vendor: CVE Published:; 12 June 2026

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What is CVE-2026-44967?

OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.