CVE-2026-44024

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.1%, top 36% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
64%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 13, 2026

Advisory Details (4)

Auto-updated Sep 12, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
github Patch Available

Remote Code Execution (RCE) via Arbitrary File Write in `${tag}` Placeholder · Advisory · fluent/fluentd · GitHub

https://github.com/fluent/fluentd/security/advisories/GHSA-44hj-4m45-frj3
github_release Patch Available

Fluentd v1.19.3

Patch available: fluent/fluentd v1.19.3

https://github.com/fluent/fluentd/releases/tag/v1.19.3
github_pr Patch Available

Backport(v1.19) output: enforce strict path boundary validation for tag

Patch available: fluent/fluentd v1.19.3 (PR #5391 merged 2026-06-25)

https://github.com/fluent/fluentd/pull/5391
github_commit Patch Available

commit 45c87a81f3ac (fluent/fluentd)

Patch available: fluent/fluentd v1.19.3 (contains commit 45c87a81f3ac)

https://github.com/fluent/fluentd/commit/45c87a81f3ac0b72b3f9dcfe8cfb5f9038f81437

Vendor Advisories for CVE-2026-44024(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
fluentd0.10.0 ... 1.9.3 (242 versions)1.19.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 07:13 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
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  6. 2026-09-14 01:11 UTCEG score recompute
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  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 21:49 UTCEG score recompute
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  5. 2026-08-23 00:19 UTCEPSS rescore
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  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-20 23:31 UTCEG score recompute
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  11. 2026-08-19 17:04 UTCEPSS rescore
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  13. 2026-08-18 13:48 UTCEPSS rescore
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  24. 2026-08-11 17:28 UTCEG score recompute
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  26. 2026-08-11 02:06 UTCEG score recompute
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-09 15:56 UTCEG score recompute
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  40. 2026-08-04 10:38 UTCEPSS rescore
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  74. 2026-07-13 06:13 UTCEPSS rescore
  75. 2026-07-12 05:46 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-44024?
CVE-2026-44024 is a critical vulnerability published on June 26, 2026. 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…
When was CVE-2026-44024 disclosed?
CVE-2026-44024 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44024 actively exploited?
CVE-2026-44024 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 36.3% of all scored CVEs.
What is the CVSS score of CVE-2026-44024?
CVE-2026-44024 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-44024?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44024, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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