Fluentd: Exposure of Sensitive Information via Monitor Agent API

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Summary

CVECVE-2026-44025
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 22:17:14 UTC
Updated2026-07-10 19:01:51 UTC
DescriptionFluentd 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.004820000 probability, percentile 0.382150000 (date 2026-07-11)

Problem Types: CWE-306 | CWE-306 CWE-306: Missing Authentication for Critical Function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fluent Fluentd affected < 1.19.3 Not specified

References

ReferenceSourceLinkTags
github.com/fluent/fluentd/releases/tag/v1.19.3 [email protected] github.com
github.com/fluent/fluentd/commit/990921518971699b9a97441970674d1800e29177 [email protected] github.com
github.com/fluent/fluentd/pull/5392 [email protected] github.com
github.com/fluent/fluentd/security/advisories/GHSA-pr7j-96cj-549h [email protected] github.com
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