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 allows dynamically constructing file paths using the ${tag} placeholder, and insufficient validation of ${tag} in file configurations such as the path parameter of the out_file plugin allows attackers sending untrusted tags containing path traversal characters to write or overwrite arbitrary files and potentially achieve remote code execution. This issue is fixed in version 1.19.3.
Fix
Public exploits 1
- 0xdak/CVE-2026-44024_exploit PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/fluent/fluentd/commit/45c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437 Patch
- https://github.com/fluent/fluentd/pull/5391 Issue Tracking, Patch
- https://github.com/fluent/fluentd/security/advisories/GHSA-44hj-4m45-frj3 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 9.8 · 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/45c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437 Patch
- https://github.com/fluent/fluentd/pull/5391 Issue Tracking, Patch
- https://github.com/fluent/fluentd/releases/tag/v1.19.3 Product, Release Notes
- https://github.com/fluent/fluentd/security/advisories/GHSA-44hj-4m45-frj3 Mitigation, Vendor Advisory