CVE-2026-44163

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Source
https://cve.org/CVERecord?id=CVE-2026-44163
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44163.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44163
Aliases
Published
2026-09-15T15:39:05Z
Modified
2026-09-18T03:31:03Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
fluent-plugin-opentelemetry: Denial of Service (DoS) via Large Payloads and Decompression Bombs in `in_opentelemetry`
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-409"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44163.json"
}
References

Affected packages

Git / github.com/fluent-plugins-nursery/fluent-plugin-opentelemetry

Affected ranges

Type
GIT
Repo
https://github.com/fluent-plugins-nursery/fluent-plugin-opentelemetry
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ce6c1f2a7741592c8a79afbe75fded9e8ebfa92d
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.5.3"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.5.1
v0.5.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44163.json"