Description
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.
Metrics
CVSS 3.1 5.3/10
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| open-telemetry | opentelemetry-cpp | < 1.27.0 |
References
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958Issue Tracking
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078Issue Tracking
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvjVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58Not Applicable, Vendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58Not Applicable, Vendor Advisory
Timeline
- Published
- Jun 12, 2026
- Last modified
- Oct 26, 2026
- NVD status
- Analyzed