CVE-2026-44024criticalCWE-22

CVE-2026-44024: critical vulnerability in fluentd

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

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48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 9.8epss 1.1%
from disclosure to weapon28 days
Published on NVDJul 8
1st PoC+28d
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
fluent · fluentd
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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