5.3
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MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Description
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.
Basic Information
ID
CVE-2025-12972
Source
certcc
Published
Nov 24, 2025 at 14:40
Modified
Nov 24, 2025 at 19:09
Affected Product
Vendor
FluentBit
Product
FluentBit
Version
4.1.0
Affected Versions
FluentBit FluentBit 4.1.0