CVE-2026-78596 - Missing Authorization in Kibana Leading to Unauthorized Cross-Space Write Operations

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MEDIUM

Missing Authorization in Kibana Leading to Unauthorized Cross-Space Write Operations

Published Sep 3, 2026

4.3

MEDIUM

CVSS 3.1

EPSS 0.27%

Description

Missing Authorization in Kibana Leading to Unauthorized Modification of Data / Missing Authorization (CWE-862) in Kibana can lead to unauthorized modification of data via Privilege Abuse (CAPEC-122). An authenticated user holding Security read-level access in a single Kibana space could trigger Entity Analytics migration operations that perform privileged writes across all Kibana spaces, regardless of that user's actual access scope.

Affected products

Vendor Elastic Product Kibana Default
unaffected
- Version
  8.18.3
  Status
  affected
  Constraints
  <=8.19.20
- Version
  9.0.3
  Status
  affected
  Constraints
  <=9.4.5
- Version
  9.5.0
  Status
  affected
  Constraints
  <=9.5.2

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Elastic

Kibana

unaffected

Version	Status	Constraints
8.18.3	affected	<=8.19.20
9.0.3	affected	<=9.4.5
9.5.0	affected	<=9.5.2

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-862

Missing Authorization

References (2)

Link	Providers	Tags
https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-3-security-update-esa-2026-154/390161
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-70660		Advisory