Vulnerability Description
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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/fluent/fluent-plugin-s3/commit/e085aee001d15bcc4bd073507e7407
- https://github.com/fluent/fluent-plugin-s3/releases/tag/v1.8.5
- https://github.com/fluent/fluent-plugin-s3/security/advisories/GHSA-xv9w-7v6q-hp
FAQ
What is CVE-2026-44162?
CVE-2026-44162 is a vulnerability with a CVSS score of 2.7 (LOW). 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 wit...
How severe is CVE-2026-44162?
CVE-2026-44162 has been rated LOW with a CVSS base score of 2.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44162?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.