[ CVE-2026-102406 · Published 6 Oct 2026 ]
Vulnerability in Elastic Kibana
[ Description ]Official description
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana could lead to cross-tenant data interception. In this context, "tenant" refers to a user or team sharing the same Kibana deployment, not a separate Elastic Cloud organization or customer. Kibana's Fleet package installation process allowed a user holding delegated Fleet package-management privileges, without direct Elasticsearch administrative privileges, to claim a data stream identifier already in use by another tenant. Because ownership of that identifier was not verified before Fleet applied the uploaded package's generated index and ingest-pipeline settings to already-existing infrastructure, an attacker could redirect an existing tenant's data stream through infrastructure under their control. This exposed the affected tenant's subsequently ingested data to unauthorized disclosure and modification, and prevented that data from reaching its intended destination. Interception could continue even after the malicious package was removed, requiring separate remediation of the affected infrastructure.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1276
Multiple vulnerabilities in Elastic products Translated from French
Multiple vulnerabilities have been discovered in Elastic products. Some of them allow an attacker to cause privilege escalation, a breach of data confidentiality and a security policy bypass.
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BSI CERT-BundWID-SEC-2026-3782
Kibana: Multiple vulnerabilities allow bypassing security measures Translated from German
[ References ]References
- discuss.elastic.co/t/kibana-8-19-22-9-4-7-9-5-4-security-update-esa-2026-187/390860Vendor AdvisoryMitigation