What’s Vulnerable › Vulnerabilities
CVE-2026-78581: Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana
- Severity: medium (CVSS 4.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-25 · updated 2026-09-02
- Weakness: CWE-639
Description
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier to access or modify a conversation they do not own. Successful exploitation requires knowledge of a hard-to-guess identifier.
Affected products
- Kibana: from 8.0.0 before 8.16.3; from 8.17.0 before 8.17.2 — fixed in 8.16.3, 8.17.2
How to fix
Upgrade to a fixed version: Kibana 8.16.3, 8.17.2. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-78581 or the next vulnerability affects your stack