CVE-2026-44024
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductFluentd
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- fluentd fluentd1.19.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fluentd fluentd | v < 1.19.3 | 1.19.3 |
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