Disclosure summary
Fluent Bit out_file plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause Fluent Bit to write files outside the intended output directory.
Source-reported weakness categories
CWE-22
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-12972
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| treasuredata | fluent_bit | 4.1.0 |
Original records & references
PUBLISHED 2025-11-24T10:15:46-05:00
MODIFIED 2026-10-08T06:10:00-04:00
INGESTED 2026-10-08T12:35:23-04:00