CVE-2026-42397

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes excessive resource consumption, which may render Kibana unavailable.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 21, 2026

Last Modified

August 6, 2026

Advisory Details (1)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

Kibana 9.3.7, 9.4.4 Security Update (ESA-2026-55) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/kibana-9-3-7-9-4-4-security-update-esa-2026-55/388554/1

Vendor Advisories for CVE-2026-42397(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 16× in last 7d / 71× 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 131 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:37 UTCEPSS rescore
  3. 2026-09-11 09:00 UTCEG score recompute
  4. 2026-09-11 09:00 UTCGHSA enrichment
  5. 2026-09-10 09:34 UTCEPSS rescore
  6. 2026-09-09 11:18 UTCEG score recompute
  7. 2026-09-09 11:18 UTCGHSA enrichment
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 22:34 UTCEG score recompute
  10. 2026-09-07 22:34 UTCGHSA enrichment
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 10:54 UTCEG score recompute
  14. 2026-09-06 10:54 UTCGHSA enrichment
  15. 2026-09-05 08:32 UTCEG score recompute
  16. 2026-09-05 08:32 UTCGHSA enrichment
  17. 2026-09-04 05:06 UTCEPSS rescore
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-02 00:56 UTCEG score recompute
  20. 2026-09-02 00:56 UTCGHSA enrichment
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-08-31 00:58 UTCEG score recompute
  23. 2026-08-31 00:58 UTCGHSA enrichment
  24. 2026-08-30 19:17 UTCEPSS rescore
  25. 2026-08-30 02:13 UTCEG score recompute
Show 75 more
  1. 2026-08-30 02:13 UTCGHSA enrichment
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 21:17 UTCEG score recompute
  5. 2026-08-27 21:17 UTCGHSA enrichment
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 21:28 UTCEG score recompute
  8. 2026-08-26 21:28 UTCGHSA enrichment
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-25 18:19 UTCEG score recompute
  11. 2026-08-25 18:19 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-24 18:49 UTCEG score recompute
  14. 2026-08-24 18:48 UTCGHSA enrichment
  15. 2026-08-23 17:32 UTCEG score recompute
  16. 2026-08-23 17:32 UTCGHSA enrichment
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 18:48 UTCEG score recompute
  19. 2026-08-22 18:48 UTCGHSA enrichment
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 20:03 UTCEG score recompute
  22. 2026-08-21 20:03 UTCGHSA enrichment
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 21:18 UTCGHSA enrichment
  25. 2026-08-19 22:34 UTCEG score recompute
  26. 2026-08-19 22:34 UTCGHSA enrichment
  27. 2026-08-19 17:03 UTCEPSS rescore
  28. 2026-08-18 20:54 UTCEG score recompute
  29. 2026-08-18 20:53 UTCGHSA enrichment
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 22:08 UTCEG score recompute
  32. 2026-08-17 22:08 UTCGHSA enrichment
  33. 2026-08-17 13:47 UTCEPSS rescore
  34. 2026-08-16 23:24 UTCEG score recompute
  35. 2026-08-16 23:24 UTCGHSA enrichment
  36. 2026-08-16 14:56 UTCEPSS rescore
  37. 2026-08-16 02:14 UTCEPSS rescore
  38. 2026-08-16 00:40 UTCGHSA enrichment
  39. 2026-08-15 01:55 UTCEG score recompute
  40. 2026-08-15 01:55 UTCGHSA enrichment
  41. 2026-08-15 01:30 UTCEPSS rescore
  42. 2026-08-14 03:10 UTCEG score recompute
  43. 2026-08-14 03:10 UTCGHSA enrichment
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-13 04:26 UTCEG score recompute
  46. 2026-08-13 04:26 UTCGHSA enrichment
  47. 2026-08-12 13:51 UTCEPSS rescore
  48. 2026-08-12 05:42 UTCEG score recompute
  49. 2026-08-12 05:42 UTCGHSA enrichment
  50. 2026-08-11 13:43 UTCEPSS rescore
  51. 2026-08-11 06:54 UTCEG score recompute
  52. 2026-08-11 06:54 UTCGHSA enrichment
  53. 2026-08-11 00:00 UTCEPSS rescore
  54. 2026-08-10 08:10 UTCEG score recompute
  55. 2026-08-10 08:10 UTCGHSA enrichment
  56. 2026-08-09 13:46 UTCEPSS rescore
  57. 2026-08-09 09:26 UTCGHSA enrichment
  58. 2026-08-08 10:41 UTCEG score recompute
  59. 2026-08-08 10:41 UTCGHSA enrichment
  60. 2026-08-07 11:56 UTCEG score recompute
  61. 2026-08-07 11:56 UTCGHSA enrichment
  62. 2026-08-06 13:46 UTCEPSS rescore
  63. 2026-08-06 13:12 UTCGHSA enrichment
  64. 2026-08-05 20:20 UTCEG score recompute
  65. 2026-08-05 20:20 UTCGHSA enrichment
  66. 2026-08-05 19:17 UTCEPSS rescore
  67. 2026-08-04 21:36 UTCEG score recompute
  68. 2026-08-04 21:35 UTCGHSA enrichment
  69. 2026-08-04 15:10 UTCEPSS rescore
  70. 2026-08-04 10:38 UTCEPSS rescore
  71. 2026-08-03 22:49 UTCGHSA enrichment
  72. 2026-08-03 00:04 UTCEG score recompute
  73. 2026-08-03 00:04 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-02 01:19 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-42397?
CVE-2026-42397 is a medium vulnerability published on July 21, 2026. Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes…
When was CVE-2026-42397 disclosed?
CVE-2026-42397 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42397 actively exploited?
CVE-2026-42397 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 64.6% of all scored CVEs.
What is the CVSS score of CVE-2026-42397?
CVE-2026-42397 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-42397?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42397, 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-2026-42397

Explore →

Is Your Infrastructure Affected by CVE-2026-42397?

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

Start Free Scan →Browse All CVEs