fluentd Known Vulnerabilities & Fixes
fluentd has 5 known security vulnerabilities in RubyGems (Ruby). Upgrade to version 1.19.3 or later to resolve all known issues. Data sourced from OSV, enriched with EPSS exploit probability and CISA KEV.
Low Immediate Risk
No actively exploited vulnerabilities detected. Monitor and update in your next maintenance window.
Recommended safe version: 1.19.3
Upgrading to 1.19.3 or later resolves all 5 known vulnerabilities in fluentd. Run: gem install fluentd -v 1.19.3
Is fluentd in your project?
Check if you're affected and upgrade to 1.19.3 to stay secure.
Security Summary
- 5 affected version ranges have been identified across these 5 advisories.
- 100% of known issues have a published fixed version.
- Remediation: gem update fluentd
Vulnerabilities
5 unique vulnerabilities — sorted by exploitation risk (KEV → EPSS → CVSS). Click a CVE/GHSA ID for full details. First disclosed May 13, 2022, most recently Jun 26, 2026 (1506 days apart).
| CVE / GHSA | Severity | Affected | Fixed In |
|---|---|---|---|
| CVE-2026-44024 Fluentd is Vulnerable to Remote Code Execution (RCE) via Arbitrary File Write in `${tag}` Placeholder | CRITICAL | 0.10.0, 0.10.1, 0.10.10, 0.10.11 (+238 more) | 1.19.3 |
| CVE-2017-10906 Fluentd Escape Sequence Injection Vulnerability | CRITICAL | 0.12.29, 0.12.30, 0.12.31, 0.12.32 (+8 more) | 0.12.41 |
| CVE-2026-44160 Fluentd is Vulnerable to Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward` | HIGH | 0.10.0, 0.10.1, 0.10.10, 0.10.11 (+238 more) | 1.19.3 |
| CVE-2026-44025 Fluentd is Vulnerable to Exposure of Sensitive Information via Monitor Agent API | HIGH | 0.10.0, 0.10.1, 0.10.10, 0.10.11 (+238 more) | 1.19.3 |
| CVE-2026-44161 Fluentd is Vulnerable to Server-Side Request Forgery (SSRF) via Placeholder Expansion in `out_http` | HIGH | 0.10.0, 0.10.1, 0.10.10, 0.10.11 (+238 more) | 1.19.3 |
About This Data
Vulnerability data for fluentd is sourced from the Open Source Vulnerability (OSV) database, aggregating reports from GitHub Advisory Database, NIST NVD, and ecosystem-specific sources.
CVSS (Common Vulnerability Scoring System) scores reflect exploitability and impact. EPSS (Exploit Prediction Scoring System) scores indicate the probability of exploitation within the next 30 days. Vulnerabilities marked with are listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
Related RubyGems (Ruby) Packages
Other packages in this ecosystem, ranked by shared vulnerabilities where available.
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