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

Quick assessment

Affected
fluent fluentd
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fluentd是Fluentd团队开源的一个开源日志收集器。从各种数据源收集事件,并将其写入文件、RDBMS、NoSQL、IaaS、SaaS、Hadoop等。 Fluentd 1.19.3之前版本存在授权问题漏洞，该漏洞源于Monitor Agent插件in_monitor_agent通过REST API暴露内部指标和插件信息，且/api/plugins.json及相关端点的响应中意外包含可能含有数据库密码、API密钥或云凭据的内部实例变量，可能导致信息泄露。

CVSS 7.5 · High EPSS 0.41% · P35

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
fluent fluentd < 1.19.3 affected
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I. Basic Information for CVE-2026-44025

Vulnerability Information
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Vulnerability Title
Fluentd: Exposure of Sensitive Information via Monitor Agent API
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Fluentd 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fluentd是Fluentd团队开源的一个开源日志收集器。从各种数据源收集事件,并将其写入文件、RDBMS、NoSQL、IaaS、SaaS、Hadoop等。 Fluentd 1.19.3之前版本存在授权问题漏洞，该漏洞源于Monitor Agent插件in_monitor_agent通过REST API暴露内部指标和插件信息，且/api/plugins.json及相关端点的响应中意外包含可能含有数据库密码、API密钥或云凭据的内部实例变量，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fluent fluentd < 1.19.3 -

II. Public POCs for CVE-2026-44025

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6665 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-44025

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Patches & Fixes for CVE-2026-44025 (2)

Vendor Advisories for CVE-2026-44025 (1)

Vendor Pages for CVE-2026-44025 (1)

Same Patch Batch · fluent · 2026-07-08 · 4 CVEs total

CVE-2026-44024 9.8 CRITICAL Fluentd: Remote Code Execution (RCE) via Arbitrary File Write in `${tag}` Placeholder
CVE-2026-44160 7.5 HIGH Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`
CVE-2026-44161 7.2 HIGH Fluentd: Server-Side Request Forgery (SSRF) via Placeholder Expansion in `out_http`

IV. Related Vulnerabilities

Same product: fluentd
Same vendor: fluent
Same weakness: CWE-306

V. Comments for CVE-2026-44025

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