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Weekly Signal
Live intelligence Updated 20 Aug 2026 · 23:29 UTC

Elastic · Kibana

CVE-2026-42397

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An a...

Recommended action

Handle this through the normal risk-based patching cycle while monitoring for change. Vendor advisory from discuss.elastic.co

View response plan
CVSS6.5
EPSS0.3%
KEVNo
ExploitationNone
RemediationNot yet verified

Assessment

Why it matters

EPSS is 0.3%; technical severity is CVSS 6.5.

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.

Who should care

  • Teams operating Kibana
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Kibana is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Vendor advisory from discuss.elastic.co
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-770
Affected versions
Elastic Kibana (Start Including 9.3.0, End Excluding 9.3.7 | Start Including 9.4.0, End Excluding 9.4.4)
Fixed versions
Elastic Kibana (Fixed from 9.3.7, 9.4.4)
Published
21 July 2026
Attack vector
Network
Privileges required
Low
User interaction
None

Signal timeline

  1. CVE published
  2. Latest EPSS score: 0.3%
  3. Signal calculated at 11

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.