Vulnerability · Published Jul 8, 2026 · Assigned by GitHub_M

CVE-2026-44025Fluentd: Exposure of Sensitive Information via Monitor Agent API

High 7.5

In plain English

A high-severity missing authentication in fluentd from fluent. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 58.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
RubyGems	fluentd	1.19.3	GHSA-pr7j-96cj-549h

Affected products (as reported)

Vendor	Product	Versions
fluent	fluentd	< 1.19.3

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/fluent/fluentd/security/advisories/GHSA-pr7j-96cj-549h x_refsource_CONFIRM
https://github.com/fluent/fluentd/pull/5392 x_refsource_MISC
https://github.com/fluent/fluentd/commit/990921518971699b9a97441970674d1800e29177 x_refsource_MISC
https://github.com/fluent/fluentd/releases/tag/v1.19.3 x_refsource_MISC