Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Opentelemetry | Opentelemetry | < 1.27.0 |
Related Weaknesses (CWE)
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-5qhVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rrNot ApplicableVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rrNot ApplicableVendor Advisory
FAQ
What is CVE-2026-44967?
CVE-2026-44967 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 witho...
How severe is CVE-2026-44967?
CVE-2026-44967 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44967?
Check the references section above for vendor advisories and patch information. Affected products include: Opentelemetry Opentelemetry.