What is CVE-2026-44025?
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 record classifies CVE-2026-44025 under weakness class CWE-306. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 107 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS (FIRST)
- 0.4% probability of exploitation in the next 30 days, higher than 39.0% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 5.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-07-08, last modified 2026-07-09
Is CVE-2026-44025 being exploited?
It currently carries a trending score of 21 in the Threadlinqs vulnerability feed.
Affected products and versions
- fluent: fluentd
Affected software packages:
rubygems:fluentd— patched in 1.19.3
How to fix CVE-2026-44025
The record marks a vendor fix as available for CVE-2026-44025. Fixed versions are recorded for 1 package: rubygems:fluentd 1.19.3. Patch reference: https://github.com/fluent/fluentd/commit/990921518971699b9a97441970674d1800e29177. Vendor advisory: https://github.com/fluent/fluentd/security/advisories/GHSA-pr7j-96cj-549h. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-44025
1 tracked threat in the Threadlinqs corpus references CVE-2026-44025, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.