CVE-2026-44967: Opentelemetry

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Opentelemetry Opentelemetry: before 1.27.0 (fixed in 1.27.0)

Published 2026-06-12. Last modified 2026-06-17.