CVE-2026-78583Network attack vector

Cluster privilege escalation via unvalidated package declarations

Published Sep 3, 2026 · Updated Sep 3, 2026

Incorrect authorization in Elastic Kibana allows remote authenticated users to gain Elasticsearch cluster administrator privileges. Kibana accepts cluster privilege declarations from integration packages without validating them before minting credentials for enrolled Elastic Agents. Fleet management privileges are required, and a crafted declaration can elevate every agent on the targeted policy to full cluster administration.

CVSS severity8.1
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Elastic Kibana allows remote authenticated users to gain Elasticsearch cluster administrator privileges. Kibana accepts cluster privilege declarations from integration packages without validating them before minting credentials for enrolled Elastic Agents. Fleet management privileges are required, and a crafted declaration can elevate every agent on the targeted policy to full cluster administration.

The record

CVE
CVE-2026-78583
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
Elastic
Product
Kibana
Classifications
CWE-863, CAPEC-153, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.0 <=8.19.20
  2. Affected versionversion=9.0.0 <=9.4.5
  3. Affected versionversion=9.5.0 <=9.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Kibanaversion=8.0.0 <=8.19.20; version=9.0.0 <=9.4.5; version=9.5.0 <=9.5.2

Published CVSS scores

8.1ElasticCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CAPEC-153Input Data Manipulation
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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