Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10 Patch
- https://github.com/fluent/fluentd/pull/5393 Issue Tracking, Patch
- https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · fluentdNVD modified 2026-10-25 17:10
Affected (CPE criteria) 1
cpe:2.3:a:fluentd:fluentd:*:*:*:*:*:*:*:*
References 4
- https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10 Patch
- https://github.com/fluent/fluentd/pull/5393 Issue Tracking, Patch
- https://github.com/fluent/fluentd/releases/tag/v1.19.3 Product, Release Notes
- https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7 Mitigation, Vendor Advisory