fluent Fluentd up to 1.19.2 Monitor Agent Plugin /api/plugins.json missing initialization

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.54

Summaryinfo

A vulnerability was found in fluent Fluentd up to 1.19.2. It has been rated as problematic. Impacted is an unknown function of the file /api/plugins.json of the component Monitor Agent Plugin. This manipulation causes missing initialization. This vulnerability is handled as CVE-2026-44025. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in fluent Fluentd up to 1.19.2 and classified as problematic. Affected by this vulnerability is an unknown function of the file /api/plugins.json of the component Monitor Agent Plugin. The manipulation with an unknown input leads to a missing initialization vulnerability. The CWE definition for the vulnerability is CWE-456. The product does not initialize critical variables, which causes the execution environment to use unexpected values. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-44025 since 05/04/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

By approaching the search of inurl:api/plugins.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.19.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing initialization
CWE: CWE-456 / CWE-453
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Fluentd 1.19.3

Timelineinfo

05/04/2026 CVE reserved
07/08/2026 +65 days VulDB entry created
07/09/2026 +0 days Advisory disclosed
07/09/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-44025 (🔒)
GCVE (CVE): GCVE-0-2026-44025
GCVE (VulDB): GCVE-100-377041

Entryinfo

Created: 07/09/2026 00:20
Changes: 07/09/2026 00:20 (54)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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