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Critical Vulnerabilities in Fluentd Enable Remote Code Execution and SSRF

First seen 1 Jul 2026, 10:45 UTC • •
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ThreatCluster AI
ThreatCluster •July 2, 2026 at 10:13 UTC
  • •Fluentd v1.19.3 fixes critical RCE vulnerability CVE-2026-44024.
  • •Exploitation could lead to arbitrary code execution and data exposure.
  • •Organizations should prioritize updates and enhance monitoring capabilities.

Fluentd v1.19.3 addresses multiple vulnerabilities, including a critical RCE flaw tracked as CVE-2026-44024. These vulnerabilities can allow unauthenticated remote attackers to execute arbitrary code, access sensitive data, and perform server-side request forgery (SSRF). The issues primarily affect instances processing untrusted input or using vulnerable placeholder features. The impact is significant, as compromised Fluentd instances can expose sensitive infrastructure information across connected systems. No public evidence of exploitation has been reported yet, but organizations are urged to prioritize updates. The Centre for Cybersecurity Belgium recommends immediate patching and enhanced monitoring to detect potential intrusions.

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Timeline

2026-06-26
Fluentd v1.19.3 released
This version addresses multiple vulnerabilities, including CVE-2026-44024, which allows remote code execution.
www.tenable.com
2026-06-30
CVE-2026-44024 disclosed
The vulnerability allows arbitrary file writes via the ${tag} placeholder, impacting confidentiality and integrity.
Ccb.Belgium.Be
2026-07-01
Security flaws reported
Multiple high-impact vulnerabilities in Fluentd were confirmed, enabling RCE, SSRF, and DoS attacks.
Gbhackers
2026-07-01
Multiple vulnerabilities detailed
High-severity flaws in Fluentd could lead to remote code execution and data leaks, affecting various components.
Cybersecuritynews

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