CVE-2026-78581

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory published 2026-08-25. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.2Exploit: None knownExposed: 0

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

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier to access or modify a conversation they do not own. Successful exploitation requires knowledge of a hard-to-guess identifier.

CVSS v3
4.2
EG Score
4.2(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity42% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 2, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
No patch confirmed yet.
generic

Kibana 8.16.3, 8.17.2 Security Update (ESA-2026-51) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/kibana-8-16-3-8-17-2-security-update-esa-2026-51/387446

Vendor Advisories for CVE-2026-78581(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 21× in last 7d / 80× 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. 2026-09-21 04:00 UTCEG score recompute
  2. 2026-09-21 04:00 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 05:44 UTCEG score recompute
  5. 2026-09-20 05:44 UTCGHSA enrichment
  6. 2026-09-19 07:28 UTCEG score recompute
  7. 2026-09-19 07:28 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 09:12 UTCEG score recompute
  10. 2026-09-18 09:12 UTCGHSA enrichment
  11. 2026-09-17 10:56 UTCEG score recompute
  12. 2026-09-17 10:56 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 12:39 UTCEG score recompute
  15. 2026-09-16 12:39 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 14:23 UTCEG score recompute
  18. 2026-09-15 14:23 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 16:07 UTCGHSA enrichment
  22. 2026-09-13 17:51 UTCEG score recompute
  23. 2026-09-13 17:51 UTCGHSA enrichment
  24. 2026-09-12 19:35 UTCEG score recompute
  25. 2026-09-12 19:35 UTCGHSA enrichment
Show 55 more
  1. 2026-09-11 21:19 UTCEG score recompute
  2. 2026-09-11 21:19 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-10 23:02 UTCEG score recompute
  6. 2026-09-10 23:02 UTCGHSA enrichment
  7. 2026-09-10 00:46 UTCGHSA enrichment
  8. 2026-09-09 02:30 UTCEG score recompute
  9. 2026-09-09 02:30 UTCGHSA enrichment
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-08 04:13 UTCEG score recompute
  12. 2026-09-08 04:13 UTCGHSA enrichment
  13. 2026-09-07 05:56 UTCEG score recompute
  14. 2026-09-07 05:56 UTCGHSA enrichment
  15. 2026-09-06 13:48 UTCEPSS rescore
  16. 2026-09-06 07:40 UTCEG score recompute
  17. 2026-09-06 07:40 UTCGHSA enrichment
  18. 2026-09-05 09:24 UTCEG score recompute
  19. 2026-09-05 09:24 UTCGHSA enrichment
  20. 2026-09-04 11:08 UTCEG score recompute
  21. 2026-09-04 11:08 UTCGHSA enrichment
  22. 2026-09-04 05:07 UTCEPSS rescore
  23. 2026-09-03 12:51 UTCGHSA enrichment
  24. 2026-09-02 14:34 UTCGHSA enrichment
  25. 2026-09-02 07:24 UTCEG score recompute
  26. 2026-09-02 07:24 UTCGHSA enrichment
  27. 2026-09-01 13:54 UTCEPSS rescore
  28. 2026-09-01 09:07 UTCEG score recompute
  29. 2026-09-01 09:07 UTCGHSA enrichment
  30. 2026-09-01 04:40 UTCEPSS rescore
  31. 2026-09-01 04:40 UTCEPSS rescore
  32. 2026-08-31 10:48 UTCEG score recompute
  33. 2026-08-31 10:47 UTCGHSA enrichment
  34. 2026-08-30 19:18 UTCEPSS rescore
  35. 2026-08-30 19:17 UTCEPSS rescore
  36. 2026-08-30 12:27 UTCEG score recompute
  37. 2026-08-30 12:27 UTCGHSA enrichment
  38. 2026-08-30 01:22 UTCEPSS rescore
  39. 2026-08-29 14:11 UTCEG score recompute
  40. 2026-08-29 14:10 UTCGHSA enrichment
  41. 2026-08-28 21:42 UTCEPSS rescore
  42. 2026-08-28 15:52 UTCGHSA enrichment
  43. 2026-08-28 10:11 UTCEG score recompute
  44. 2026-08-28 10:11 UTCGHSA enrichment
  45. 2026-08-27 14:25 UTCEPSS rescore
  46. 2026-08-27 11:54 UTCEG score recompute
  47. 2026-08-27 11:54 UTCGHSA enrichment
  48. 2026-08-26 14:47 UTCEPSS rescore
  49. 2026-08-26 13:38 UTCEG score recompute
  50. 2026-08-26 13:38 UTCGHSA enrichment
  51. 2026-08-25 15:21 UTCEG score recompute
  52. 2026-08-25 15:15 UTCEG score recompute
  53. 2026-08-25 13:22 UTCEG score recompute
  54. 2026-08-25 13:16 UTCEG score recompute
  55. 2026-08-25 13:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78581?
CVE-2026-78581 is a medium vulnerability published on August 25, 2026. Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier…
When was CVE-2026-78581 disclosed?
CVE-2026-78581 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78581 actively exploited?
CVE-2026-78581 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-78581?
CVE-2026-78581 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-78581?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78581, 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-2026-78581

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