CVE-2026-42397

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH 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(high)
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
21%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 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 19× in last 7d / 22× 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. 2026-07-29 06:16 UTCEG score recompute
  2. 2026-07-29 06:15 UTCGHSA enrichment
  3. 2026-07-28 15:36 UTCEPSS rescore
  4. 2026-07-28 07:30 UTCEG score recompute
  5. 2026-07-28 07:30 UTCGHSA enrichment
  6. 2026-07-27 14:13 UTCEPSS rescore
  7. 2026-07-27 08:46 UTCEG score recompute
  8. 2026-07-27 08:46 UTCGHSA enrichment
  9. 2026-07-26 14:54 UTCEPSS rescore
  10. 2026-07-26 14:54 UTCEPSS rescore
  11. 2026-07-26 10:02 UTCEG score recompute
  12. 2026-07-26 10:01 UTCGHSA enrichment
  13. 2026-07-25 14:18 UTCEPSS rescore
  14. 2026-07-24 14:17 UTCEPSS rescore
  15. 2026-07-23 14:18 UTCEPSS rescore
  16. 2026-07-23 03:11 UTCEG score recompute
  17. 2026-07-22 22:59 UTCEG score recompute
  18. 2026-07-22 22:59 UTCGHSA enrichment
  19. 2026-07-22 14:08 UTCEPSS rescore
  20. 2026-07-21 21:25 UTCEG score recompute
  21. 2026-07-21 20:16 UTCEG score recompute
  22. 2026-07-21 20:13 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 July 22, 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 78.8% 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

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