CVE-2026-78591

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory published 2026-09-02. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in the Kibana Fleet feature can lead to the unauthorized deletion of resources via Path Traversal (CAPEC-126). A low-privileged user could cause a subsequent action taken by a higher-privileged user in the Fleet administration interface to act on an unintended target, resulting in the deletion of resources including accounts with elevated privileges.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 2, 2026
No patch confirmed yet.
generic

Kibana 8.19.17, 9.3.6, 9.4.3 Security Update (ESA-2026-159) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-159/390114

Vendor Advisories for CVE-2026-78591(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 64× 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. 2026-09-24 18:52 UTCEG score recompute
  2. 2026-09-24 18:52 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 19:49 UTCEG score recompute
  5. 2026-09-23 19:49 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 19:56 UTCEG score recompute
  8. 2026-09-22 19:56 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 20:51 UTCGHSA enrichment
  12. 2026-09-20 21:48 UTCEG score recompute
  13. 2026-09-20 21:48 UTCGHSA enrichment
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-19 22:44 UTCEG score recompute
  16. 2026-09-19 22:44 UTCGHSA enrichment
  17. 2026-09-18 23:41 UTCEG score recompute
  18. 2026-09-18 23:40 UTCGHSA enrichment
  19. 2026-09-18 19:28 UTCEPSS rescore
  20. 2026-09-18 00:37 UTCEG score recompute
  21. 2026-09-18 00:37 UTCGHSA enrichment
  22. 2026-09-17 01:33 UTCEG score recompute
  23. 2026-09-17 01:33 UTCGHSA enrichment
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 39 more
  1. 2026-09-16 02:29 UTCGHSA enrichment
  2. 2026-09-15 03:25 UTCEG score recompute
  3. 2026-09-15 03:25 UTCGHSA enrichment
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-14 04:22 UTCEG score recompute
  7. 2026-09-14 04:22 UTCGHSA enrichment
  8. 2026-09-13 05:18 UTCEG score recompute
  9. 2026-09-13 05:18 UTCGHSA enrichment
  10. 2026-09-12 06:14 UTCEG score recompute
  11. 2026-09-12 06:14 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 07:10 UTCEG score recompute
  15. 2026-09-11 07:10 UTCGHSA enrichment
  16. 2026-09-10 08:06 UTCGHSA enrichment
  17. 2026-09-09 09:03 UTCEG score recompute
  18. 2026-09-09 09:03 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 09:59 UTCEG score recompute
  21. 2026-09-08 09:59 UTCGHSA enrichment
  22. 2026-09-07 10:07 UTCEG score recompute
  23. 2026-09-07 10:07 UTCGHSA enrichment
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-06 11:02 UTCEG score recompute
  26. 2026-09-06 11:02 UTCGHSA enrichment
  27. 2026-09-05 11:58 UTCEG score recompute
  28. 2026-09-05 11:58 UTCGHSA enrichment
  29. 2026-09-04 12:54 UTCEG score recompute
  30. 2026-09-04 12:54 UTCGHSA enrichment
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-03 13:50 UTCGHSA enrichment
  33. 2026-09-02 19:32 UTCEG score recompute
  34. 2026-09-02 19:32 UTCGHSA enrichment
  35. 2026-09-02 16:20 UTCEG score recompute
  36. 2026-09-02 16:19 UTCGHSA enrichment
  37. 2026-09-02 15:31 UTCEG score recompute
  38. 2026-09-02 14:53 UTCEG score recompute
  39. 2026-09-02 14:51 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78591?
CVE-2026-78591 is a medium vulnerability published on September 2, 2026. Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in the Kibana Fleet feature can lead to the unauthorized deletion of resources via Path Traversal (CAPEC-126). A low-privileged user could cause a subsequent action taken by a higher-privileged user in the Fleet…
When was CVE-2026-78591 disclosed?
CVE-2026-78591 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78591 actively exploited?
CVE-2026-78591 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 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-78591?
CVE-2026-78591 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-78591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78591, 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

Explore the affected products and dependency analysis for CVE-2026-78591

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