CVE-2026-44025
Prior to 1.19.3, Fluentd's Monitor Agent plugin in_monitor_agent exposes internal metrics and plugin information via a REST API, and responses from /api/plugins.json and related endpoints unintentionally include internal instance variables that may…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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's Monitor Agent plugin in_monitor_agent exposes internal metrics and plugin information via a REST API, and responses from /api/plugins.json and related endpoints unintentionally include internal instance variables that may contain database passwords, API keys, or cloud credentials. This issue is fixed in version 1.19.3.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.47% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-306
- Affected
- fluentd/fluentd
- Source
- security-advisories@github.com
References
- https://github.com/fluent/fluentd/commit/990921518971699b9a97441970674d1800e29177Patch
- https://github.com/fluent/fluentd/pull/5392Issue Tracking, Patch
- https://github.com/fluent/fluentd/releases/tag/v1.19.3Release Notes
- https://github.com/fluent/fluentd/security/advisories/GHSA-pr7j-96cj-549hPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.