CVE-2026-44967
mediumpriority · track · 21EPSS 0.002 · 11 %ileEUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (13)
External citations — patches, advisories, analysis.
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958cnnvd
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078cnnvd
- https://github.com/open-telemetry/opentelemetry-cpp/releasesPatchcnnvd
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvjcnnvd
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58cnnvd
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958enisa_euvd
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078enisa_euvd
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvjenisa_euvd
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