CVE-2026-44024

Critical · CVSS 9.8

fluentd — Path Traversal via tag placeholder leading to arbitrary file write / RCE (CWE-22)

CVSS: 9.8; nvd
EPSS: —
KEV: No
Class: oss containerizable; CWE-22

Description

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.

Search profile — drives PoC discovery

Symbols ${tag}out_filepathtag placeholderpath traversalout_file pluginfluentd configGHSA-44hj-4m45-frj345c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437

Keywords CVE-2026-44024fluentd path traversalfluentd tag placeholder RCEfluentd out_file arbitrary file writefluentd ${tag} traversalGHSA-44hj-4m45-frj3fluentd 1.19.3fluentd file path injection

Versions: < 1.19.3

Affected packages

RubyGems

fluentd

0 → 1.19.3

References

Status: enriched · ingested 2026-07-10T06:00:46.000Z · profiled 2026-07-10T06:30:26.000Z