CVE-2026-440257.5HighCWE-306

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

fluent · fluentd

No fix listed · Affected: fluentd · Exploitation: not established

ExploitationNot established

Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)

In CISA KEV: not seen
Exploited (reported): not seen
Scanning observed: not seen
Proof of concept public: not seen
Not establishedNothing in the sources we check

0.5%probability of exploitation in the next 30 days

41st percentile

050100

Higher than 41% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionNVD

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.

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Missing Authentication · Authentication
Vendor: fluent
Published: July 2026
Band: Unlikely (under 1%), July 2026

Coverage1 article · 1 outlet

First in our coverage: SecurityOnline, 1 Jul.

1 Jul 02:41
Fluentd fixes critical RCE bug CVE-2026-44024 in log collector
SecurityOnline · first in our coverage · mentions it in passing

New articles also arrive in the RSS feed.