CVE-2025-12972Path Traversal in Fluent BIT

Severity
5.3MEDIUMNVD
EPSS
0.1%
top 71.02%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedNov 24
Latest updateDec 1

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NExploitability: 3.9 | Impact: 1.4

🔴Vulnerability Details

1
GHSA
GHSA-mjmc-4hm9-g39m: Fluent Bit out_file plugin does not properly sanitize tag values when deriving output file names2025-11-24

📋Vendor Advisories

1
Microsoft
An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd) as distributed in GNU Binutils 2.32. There is a heap-based buffer over-read in _bfd_doprnt in bfd.c because elf_object_2019-06-11

🕵️Threat Intelligence

1
Wiz
Supply Chain Attacks & AI Vulnerabilities: December Cloud Security Update | Wiz2025-12-01