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    2 vulnerabilities found for fluent-plugin-s3 by fluent

    CVE-2026-44162 (GCVE-0-2026-44162)

    Vulnerability from nvd – Published: 2026-09-14 17:45 – Updated: 2026-09-14 18:14
    VLAI
    Title
    fluent-plugin-s3: Denial of Service (DoS) via Decompression Bomb in `in_s3`
    Summary
    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.
    Severity
    2.7 (Low)
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-14 18:14 UTC
    CWE
    • CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
    Assigner
    References
    Impacted products
    Vendor Product Version
    fluent fluent-plugin-s3 Affected: >= 0.7.0, < 1.8.5
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-44162 (GCVE-0-2026-44162)

    Vulnerability from cvelistv5 – Published: 2026-09-14 17:45 – Updated: 2026-09-14 18:14
    VLAI
    Title
    fluent-plugin-s3: Denial of Service (DoS) via Decompression Bomb in `in_s3`
    Summary
    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.
    Severity
    2.7 (Low)
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-14 18:14 UTC
    CWE
    • CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
    Assigner
    References
    Impacted products
    Vendor Product Version
    fluent fluent-plugin-s3 Affected: >= 0.7.0, < 1.8.5
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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