23 Oct 2026 15:48:27 UTC
fluent-plugin-s3: Denial of Service (DoS) via Decompression Bomb in `in_s3`
cve-program · CVE-2026-44162 · Published
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
cve-program · CVE-2026-44162
Publishedfluent-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.
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