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CVE-2026-78583— Incorrect Authorization in Kibana Leading to Privilege Escalation

Quick assessment

Affected
Elastic Kibana
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kibana 中存在不正确的授权漏洞（CWE-863），攻击者可通过输入数据操纵（CAPEC-153）实现权限提升。来自集成包的 Elasticsearch 集群权限声明在用于为已注册的 Elastic Agent 生成凭证之前，未进行有效校验。因此，拥有 Fleet 管理权限的用户可以导致目标策略下的所有 Elastic Agent 获得携带任意提升后的 Elasticsearch 集群权限的凭证，最高可提升至完整的集群管理权限。

CVSS 8.1 · High

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Kibana 8.0.0≤ 8.19.20 affected
9.0.0≤ 9.4.5 affected
9.5.0≤ 9.5.2 affected
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I. Basic Information for CVE-2026-78583

Vulnerability Information
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Vulnerability Title
Incorrect Authorization in Kibana Leading to Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect Authorization (CWE-863) in Kibana can lead to privilege escalation via Input Data Manipulation (CAPEC-153). Elasticsearch cluster privilege declarations originating from integration packages were not validated before being used to mint credentials for enrolled Elastic Agents. A user holding Fleet management privileges could therefore cause every Elastic Agent on a targeted policy to receive a credential carrying arbitrarily elevated Elasticsearch cluster privileges, up to and including full cluster administration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Kibana 8.0.0 ~ 8.19.20 -

II. Public POCs for CVE-2026-78583

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III. Intelligence Information for CVE-2026-78583

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Vendor Pages for CVE-2026-78583 (1)

Same Patch Batch · Elastic · 2026-09-03 · 7 CVEs total

CVE-2026-82302 8.1 HIGH Incorrect Authorization in Kibana Leading to Unauthorized Configuration Modification
CVE-2026-82299 6.5 MEDIUM Incorrect Authorization in Kibana Leading to Information Disclosure
CVE-2026-82298 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Denial of Service
CVE-2026-78596 4.3 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Cross-Space Write Operations
CVE-2026-78595 4.3 MEDIUM Missing Authorization in Kibana Fleet Plugin Leading to Cross-Space Agent Data Disclosure
CVE-2026-78593 4.3 MEDIUM Improper Control of Generation of Code in Kibana Leading to Privilege Escalation

IV. Related Vulnerabilities

Same product: Kibana
Same vendor: Elastic
Same weakness: CWE-863

V. Comments for CVE-2026-78583

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