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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Fluentbit |
|
No data.
No data.
References
| Link | Providers |
|---|---|
| https://fluentbit.io/announcements/v4.1.0/ |
|
History
Thu, 27 Nov 2025 10:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Fluentbit
Fluentbit fluent Bit |
|
| Vendors & Products |
Fluentbit
Fluentbit fluent Bit |
Mon, 24 Nov 2025 19:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Mon, 24 Nov 2025 14:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | CVE-2025-12972 | |
| References |
|
MITRE
Status: PUBLISHED
Assigner: certcc
Published: 2025-11-24T14:40:36.275Z
Updated: 2025-11-24T19:09:14.319Z
Reserved: 2025-11-10T18:00:22.449Z
Link: CVE-2025-12972
Vulnrichment
Updated: 2025-11-24T19:08:51.064Z
NVD
Status : Awaiting Analysis
Published: 2025-11-24T15:15:46.627
Modified: 2025-11-25T22:16:16.690
Link: CVE-2025-12972
Redhat
No data.