Elk: Missing Authorization in Kibana Leading to Unauthorized Cross-Space Write Operations (CVE-2026-78596)
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 software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-862) in Kibana involves missing authorization that permits privilege abuse (CAPEC-122). An authenticated user with limited read-level access in a single Kibana space can trigger migration operations that perform privileged writes across all Kibana spaces, bypassing intended access restrictions. The issue does not affect confidentiality or availability but impacts data integrity by allowing unauthorized modifications.
Potential Impact
The vulnerability allows unauthorized modification of data across all Kibana spaces by an authenticated user with limited access in one space. There is no impact on confidentiality or availability reported. The CVSS v3.1 base score is 4.3 (medium severity), reflecting limited impact and the requirement for authenticated access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a fix is available, restrict user privileges carefully and monitor for unusual migration operations. Avoid granting unnecessary Security read-level access in Kibana spaces.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fcr2-g7h7-m264
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78596"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a9ad514acd9273b49b681c5
Added to database: 09/04/2026, 14:26:28 UTC
Last enriched: 09/07/2026, 15:38:19 UTC
Last updated: 10/18/2026, 06:48:20 UTC
Views: 82
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