Improper Handling of Highly Compressed Data (Data Amplification) Affecting fluentd package, versions <1.19.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUBY-FLUENTD-17660640
- published27 Jun 2026
- disclosed26 Jun 2026
- crediteverping
Introduced: 26 Jun 2026
NewCVE-2026-44160 (opens in a new tab)How to fix?
Upgrade fluentd to version 1.19.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) in the in_http and in_forward plugins when decompressing gzip-compressed data. An attacker can cause excessive memory consumption by sending a highly compressed payload that expands significantly upon decompression, potentially leading to process termination and disruption of service. This is only exploitable if the instance is exposed to untrusted networks.
Workaround
This vulnerability can be mitigated by restricting network access to trusted sources using firewall rules or deploying a reverse proxy (such as Nginx) to handle gzip decompression and enforce strict body size limits before forwarding traffic.