5.3Medium
CVE-2026-44967opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
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.
Weakness (CWE):
CWE-789
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| open-telemetry | opentelemetry-cpp | < 1.27.0 | |
| opentelemetry | opentelemetry | < 1.27.0 |
References and patches
- 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 ApplicableVendor Advisory
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958 Issue Tracking
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078 Issue Tracking
CPE matches (NVD) (1)
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\+\+:*:*< 1.27.0