Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-78606
StatePUBLISHED
Assignerelastic
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-01 20:17:23 UTC
Updated2026-09-02 14:52:59 UTC
DescriptionIncorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.

Risk And Classification

Primary CVSS: v3.1 4.2 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.001450000 probability, percentile 0.040740000 (date 2026-09-03)

Problem Types: CWE-863 | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
3.1CNACVSS4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Elastic Kibana All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Elastic Kibana affected 8.19.11 8.19.20 semver Not specified
CNA Elastic Kibana affected 9.3.0 9.4.5 semver Not specified
CNA Elastic Kibana affected 9.5.0 9.5.1 semver Not specified

References

ReferenceSourceLinkTags
discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093 [email protected] discuss.elastic.co Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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