9.8

CVE-2026-44024

Fluentd: Remote Code Execution (RCE) via Arbitrary File Write in `${tag}` Placeholder

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Fluentd ≫ Fluentd Version < 1.19.3
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.09% 0.619
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

https://github.com/fluent/fluentd/security/advisories/GHSA-44hj-4m45-frj3
Vendor Advisory
Mitigation
https://github.com/fluent/fluentd/pull/5391
Patch
Issue Tracking
https://github.com/fluent/fluentd/commit/45c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437
Patch
https://github.com/fluent/fluentd/releases/tag/v1.19.3
Product
Release Notes