Vulnerability Description
fluent-plugin-opentelemetry is a Fluentd input and output plugin for forwarding OpenTelemetry Protocol data. Prior to 0.5.3, the in_opentelemetry HTTP input read the entire incoming request body and decompressed payloads into memory without enforcing maximum size thresholds. When an OpenTelemetry ingestion endpoint was exposed to an untrusted network, an attacker could send an excessively large request or a highly compressed payload that expanded in memory. The resulting memory exhaustion could cause the operating system to terminate the Fluentd process, disrupting all log collection and forwarding on the affected node. This issue is fixed in version 0.5.3.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/fluent-plugins-nursery/fluent-plugin-opentelemetry/commit/ce6
- https://github.com/fluent-plugins-nursery/fluent-plugin-opentelemetry/security/a
FAQ
What is CVE-2026-44163?
CVE-2026-44163 is a vulnerability with a CVSS score of 5.3 (MEDIUM). fluent-plugin-opentelemetry is a Fluentd input and output plugin for forwarding OpenTelemetry Protocol data. Prior to 0.5.3, the in_opentelemetry HTTP input read the entire incoming request body and d...
How severe is CVE-2026-44163?
CVE-2026-44163 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-2026-44163?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.