CVE-2026-44024: 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 allows dynamically constructing fil

criticalCVSS 9.8CVE-2026-44024

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 allows dynamically constructing file paths using the ${tag} placeholder, and insufficient validation of ${tag} in file configurations such as the path parameter of the out_file plugin allows attackers sending untrusted tags containing path traversal characters to write or overwrite arbitrary files and potentially achieve remote code execution. This issue is fixed in version 1.19.3.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: critical — CVSS 9.8
Published: 2026-07-08
Last updated: 2026-07-10
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-44024

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Moderate exploitation riskCVE-2026-440241.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-44024	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Fluentd: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Fluentdjvn

Recent advisories for Fluentd collects events

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-44161: Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS…nvd · 2026-07-08
highCVE-2026-44160: Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS…nvd · 2026-07-08
highCVE-2026-44025: Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS…nvd · 2026-07-08