CVE-2026-44161

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 63% 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
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: 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, the Fluentd out_http output plugin allows placeholders such as ${tag} in the endpoint configuration parameter, and if a placeholder value is derived from untrusted input an attacker can control the destination hostname of outbound HTTP requests and force requests to arbitrary internal services. This issue is fixed in version 1.19.3.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity72% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 13, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
github Patch Available

Server-Side Request Forgery (SSRF) via Placeholder Expansion in `out_http` · Advisory · fluent/fluentd · GitHub

https://github.com/fluent/fluentd/security/advisories/GHSA-72f5-rr8c-r6gr
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) out_http: add strict host validation for dynamic endpoints

Patch available: fluent/fluentd v1.19.3 (PR #5394 merged 2026-06-25)

https://github.com/fluent/fluentd/pull/5394
github_commit Patch Available

commit c6a01ea2e0ea (fluent/fluentd)

Patch available: fluent/fluentd v1.19.3 (contains commit c6a01ea2e0ea)

https://github.com/fluent/fluentd/commit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9

Vendor Advisories for CVE-2026-44161(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 11× in last 7d / 54× 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.

  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-25 01:02 UTCEG score recompute
  4. 2026-08-24 12:54 UTCEG score recompute
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  6. 2026-08-23 00:19 UTCEPSS rescore
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  8. 2026-08-21 23:49 UTCEPSS rescore
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  10. 2026-08-20 22:55 UTCEPSS rescore
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  12. 2026-08-19 17:04 UTCEPSS rescore
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  14. 2026-08-18 13:48 UTCEPSS rescore
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  16. 2026-08-16 20:35 UTCEG score recompute
  17. 2026-08-16 14:56 UTCEPSS rescore
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  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 08:16 UTCEG score recompute
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  24. 2026-08-12 18:56 UTCEG score recompute
  25. 2026-08-12 13:51 UTCEPSS rescore
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  1. 2026-08-11 18:44 UTCEG score recompute
  2. 2026-08-11 13:43 UTCEPSS rescore
  3. 2026-08-11 06:36 UTCEG score recompute
  4. 2026-08-11 00:00 UTCEPSS rescore
  5. 2026-08-09 17:38 UTCEG score recompute
  6. 2026-08-09 13:46 UTCEPSS rescore
  7. 2026-08-08 17:27 UTCEG score recompute
  8. 2026-08-08 16:37 UTCEPSS rescore
  9. 2026-08-07 17:15 UTCEG score recompute
  10. 2026-08-06 17:03 UTCEG score recompute
  11. 2026-08-06 13:46 UTCEPSS rescore
  12. 2026-08-06 04:56 UTCEG score recompute
  13. 2026-08-05 19:17 UTCEPSS rescore
  14. 2026-08-05 03:28 UTCEG score recompute
  15. 2026-08-04 15:10 UTCEPSS rescore
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  17. 2026-08-04 10:38 UTCEPSS rescore
  18. 2026-08-03 14:55 UTCEG score recompute
  19. 2026-08-03 10:36 UTCEPSS rescore
  20. 2026-08-02 02:38 UTCEG score recompute
  21. 2026-08-02 02:27 UTCEPSS rescore
  22. 2026-08-01 14:32 UTCEG score recompute
  23. 2026-08-01 04:16 UTCEPSS rescore
  24. 2026-07-31 02:12 UTCEG score recompute
  25. 2026-07-30 16:28 UTCEPSS rescore
  26. 2026-07-30 13:23 UTCEG score recompute
  27. 2026-07-30 01:30 UTCEPSS rescore
  28. 2026-07-28 20:26 UTCEG score recompute
  29. 2026-07-28 15:36 UTCEPSS rescore
  30. 2026-07-27 17:06 UTCEG score recompute
  31. 2026-07-27 14:13 UTCEPSS rescore
  32. 2026-07-27 02:40 UTCEG score recompute
  33. 2026-07-26 14:54 UTCEPSS rescore
  34. 2026-07-26 14:54 UTCEPSS rescore
  35. 2026-07-26 14:34 UTCEG score recompute
  36. 2026-07-25 14:18 UTCEPSS rescore
  37. 2026-07-24 14:17 UTCEPSS rescore
  38. 2026-07-23 14:18 UTCEPSS rescore
  39. 2026-07-23 03:14 UTCEG score recompute
  40. 2026-07-22 14:08 UTCEPSS rescore
  41. 2026-07-21 15:24 UTCEPSS rescore
  42. 2026-07-20 17:08 UTCEPSS rescore
  43. 2026-07-19 14:31 UTCEPSS rescore
  44. 2026-07-19 02:29 UTCEPSS rescore
  45. 2026-07-18 10:04 UTCEPSS rescore
  46. 2026-07-16 17:03 UTCEPSS rescore
  47. 2026-07-15 16:57 UTCEPSS rescore
  48. 2026-07-15 02:00 UTCEPSS rescore
  49. 2026-07-13 22:30 UTCEPSS rescore
  50. 2026-07-13 06:13 UTCEPSS rescore
  51. 2026-07-12 05:46 UTCEPSS rescore
  52. 2026-07-11 08:27 UTCEPSS rescore
  53. 2026-07-09 19:10 UTCEPSS rescore
  54. 2026-06-26 16:37 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44161?
CVE-2026-44161 is a high 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, the Fluentd out_http output plugin allows placeholders such as ${tag} in the endpoint configuration parameter, and if a placeholder value is derived from…
When was CVE-2026-44161 disclosed?
CVE-2026-44161 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-2026-44161 actively exploited?
CVE-2026-44161 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.3% of all scored CVEs.
What is the CVSS score of CVE-2026-44161?
CVE-2026-44161 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-44161?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44161, 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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