Public mode

No access to your tenant or devices. Every item links to its source. What this means

CVE-2026-44162

fluent-plugin-s3: Denial of Service (DoS) via Decompression Bomb in `in_s3`

CVSS 3.1 2.7 LOWCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-44162

Published

fluent-plugin-s3 is an Amazon S3 input and output plugin for Fluentd. From 0.7.0 to 1.8.4, the in_s3 input plugin reads the entire decompressed payload of gzip, lzma2, and lzop objects into memory without enforcing a decompression_size_limit. An attacker with permission to upload objects to the monitored S3 bucket can provide a highly compressed object that expands excessively when Fluentd processes it. The resulting memory exhaustion can cause the operating system to terminate the Fluentd process and disrupt all log collection on the affected node. This issue is fixed in version 1.8.5.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-44162

Published

fluent-plugin-s3

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "fluent",
                    "product": "fluent-plugin-s3",
                    "versions": [
                        {
                            "version": ">= 0.7.0, < 1.8.5",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON