CVE-2026-78581

MEDIUMPre-NVD 4.24.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
4.2EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.2Exploit: None knownExposed services: Not assessed

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

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
4.2MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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 (value × EchelonGraph’s weight)
Severity42% × 45%
The EG Score, 4.2 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 25, 2026

Last Modified

September 2, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
No fix on record yet.
Web page

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 20× in last 7d / 82× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 136 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 38 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:22 UTCEG score recompute
  2. 2026-10-11 16:38 UTCEG score recompute
  3. 2026-10-11 13:57 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  6. 2026-10-10 12:07 UTCEG score recompute
  7. 2026-10-10 12:06 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-09 04:25 UTCEG score recompute
  10. 2026-10-09 04:24 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-10-08 03:19 UTCEG score recompute
  13. 2026-10-08 03:19 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-10-07 01:10 UTCEG score recompute
  16. 2026-10-07 01:10 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-10-06 02:33 UTCEG score recompute
  19. 2026-10-06 02:33 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-10-05 01:34 UTCEG score recompute
  22. 2026-10-05 01:34 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-10-04 03:18 UTCEG score recompute
  25. 2026-10-04 03:18 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
Show 73 more
  1. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-10-03 05:02 UTCEG score recompute
  3. 2026-10-03 05:02 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  4. 2026-10-02 06:28 UTCEG score recompute
  5. 2026-10-02 06:28 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  6. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-10-01 05:36 UTCEG score recompute
  8. 2026-10-01 05:36 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  9. 2026-09-30 06:49 UTCEG score recompute
  10. 2026-09-30 06:49 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  11. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-09-28 21:30 UTCEG score recompute
  13. 2026-09-28 21:30 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  14. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-09-27 20:23 UTCEG score recompute
  16. 2026-09-27 20:23 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  17. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-09-26 22:06 UTCEG score recompute
  19. 2026-09-26 22:06 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-09-24 22:15 UTCEG score recompute
  23. 2026-09-24 22:15 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  24. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-23 23:27 UTCEG score recompute
  26. 2026-09-23 23:27 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  27. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-23 00:34 UTCEG score recompute
  29. 2026-09-23 00:34 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  30. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-22 02:18 UTCEG score recompute
  32. 2026-09-22 02:18 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  33. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-09-21 04:00 UTCEG score recompute
  35. 2026-09-21 04:00 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  36. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-09-20 05:44 UTCEG score recompute
  38. 2026-09-20 05:44 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  39. 2026-09-19 07:28 UTCEG score recompute
  40. 2026-09-19 07:28 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  41. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-18 09:12 UTCEG score recompute
  43. 2026-09-18 09:12 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  44. 2026-09-17 10:56 UTCEG score recompute
  45. 2026-09-17 10:56 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-09-16 12:39 UTCEG score recompute
  48. 2026-09-16 12:39 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  49. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-09-15 14:23 UTCEG score recompute
  51. 2026-09-15 14:23 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  52. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  53. 2026-09-14 16:07 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  54. 2026-09-13 17:51 UTCEG score recompute
  55. 2026-09-13 17:51 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  56. 2026-09-12 19:35 UTCEG score recompute
  57. 2026-09-12 19:35 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  58. 2026-09-11 21:19 UTCEG score recompute
  59. 2026-09-11 21:19 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  60. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-09-10 23:02 UTCEG score recompute
  62. 2026-09-10 23:02 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  63. 2026-09-10 00:46 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  64. 2026-09-09 02:30 UTCEG score recompute
  65. 2026-09-09 02:30 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  66. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  67. 2026-09-08 04:13 UTCEG score recompute
  68. 2026-09-08 04:13 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  69. 2026-09-07 05:56 UTCEG score recompute
  70. 2026-09-07 05:56 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2
  71. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-09-06 07:40 UTCEG score recompute
  73. 2026-09-06 07:40 UTCGHSA enrichmentGHSA-623v-mjrc-8wr7 · GitHub CVSS 4.2

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78581?
CVE-2026-78581 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-78581 published?
The CVE record for CVE-2026-78581 was published on August 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 2, 2026; the record at its source may have been updated since.
Is CVE-2026-78581 actively exploited?
CVE-2026-78581 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78581?
CVE-2026-78581 has a CVSS base score of 4.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78581?
No fix for CVE-2026-78581 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-78581 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-78581

Explore →

Is Your Infrastructure Affected by CVE-2026-78581?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs