BIT-fluentd-2026-44025: Fluentd: Exposure of Sensitive Information via Monitor Agent API
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.
AI Analysis
Technical Summary
The Monitor Agent plugin in Fluentd versions before 1.19.3 exposes internal plugin instance variables via its REST API, potentially leaking sensitive data including database credentials and API keys. An attacker with network access to the Monitor Agent port (default 24220) can exploit this vulnerability to retrieve such sensitive information. This vulnerability is identified as CVE-2026-44025 and is classified under CWE-200 (Exposure of Sensitive Information) and CWE-306 (Missing Authentication for Critical Function). The vulnerability has a CVSS 3.1 vector of AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating high confidentiality impact with no required privileges or user interaction. A fixed version, 1.19.3, is available to remediate this issue.
Potential Impact
An attacker who can connect to the Monitor Agent port can obtain sensitive internal plugin data, including secrets like database passwords and API keys. This exposure can lead to unauthorized access to backend systems or data breaches. The impact is high confidentiality loss but does not affect integrity or availability. The risk is contingent on network exposure of the Monitor Agent port and the specific plugin configurations in use.
Mitigation Recommendations
A patch is available in Fluentd version 1.19.3 that fixes this vulnerability. Users should upgrade to version 1.19.3 or later to remediate the issue. Until upgrading, it is recommended to restrict access to the Monitor Agent port (default 24220) to localhost only or block the port using firewall rules to prevent unauthorized network access.
BIT-fluentd-2026-44025: Fluentd: Exposure of Sensitive Information via Monitor Agent API
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 v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Monitor Agent plugin in Fluentd versions before 1.19.3 exposes internal plugin instance variables via its REST API, potentially leaking sensitive data including database credentials and API keys. An attacker with network access to the Monitor Agent port (default 24220) can exploit this vulnerability to retrieve such sensitive information. This vulnerability is identified as CVE-2026-44025 and is classified under CWE-200 (Exposure of Sensitive Information) and CWE-306 (Missing Authentication for Critical Function). The vulnerability has a CVSS 3.1 vector of AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating high confidentiality impact with no required privileges or user interaction. A fixed version, 1.19.3, is available to remediate this issue.
Potential Impact
An attacker who can connect to the Monitor Agent port can obtain sensitive internal plugin data, including secrets like database passwords and API keys. This exposure can lead to unauthorized access to backend systems or data breaches. The impact is high confidentiality loss but does not affect integrity or availability. The risk is contingent on network exposure of the Monitor Agent port and the specific plugin configurations in use.
Mitigation Recommendations
A patch is available in Fluentd version 1.19.3 that fixes this vulnerability. Users should upgrade to version 1.19.3 or later to remediate the issue. Until upgrading, it is recommended to restrict access to the Monitor Agent port (default 24220) to localhost only or block the port using firewall rules to prevent unauthorized network access.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pr7j-96cj-549h
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-44025"]
- Ecosystems
- ["RubyGems"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a3ef79627e9c79719ff8e84
Added to database: 06/26/2026, 22:05:10 UTC
Last enriched: 07/09/2026, 08:10:57 UTC
Last updated: 08/09/2026, 00:41:14 UTC
Views: 76
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