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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj Vendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 Not Applicable, Vendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 Not Applicable, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · opentelemetryNVD modified 2026-10-26 11:10
Affected (CPE criteria) 1
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\+\+:*:*
References 5
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958 Issue Tracking
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078 Issue Tracking
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj Vendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 Not Applicable, Vendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 Not Applicable, Vendor Advisory