critical9.8
CVE-2026-44024
Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | fluentd | <= 1.19.2 | 1.19.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Fluentd | Fluentd | before 1.19.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-44hj-4m45-frj3
- https://github.com/fluent/fluentd/security/advisories/GHSA-44hj-4m45-frj3
- https://github.com/fluent/fluentd/releases/tag/v1.19.3
- https://github.com/fluent/fluentd/commit/45c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437
- https://github.com/fluent/fluentd/pull/5391