CVE-2026-78581Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana
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It affects Elastic Kibana. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.2 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- elastic
- NVD analysis
- Analyzed
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Elastic Kibana elastic:kibana (from the name) | from 8.0.0 through 8.16.2 | CNA record |
elastic kibana elastic:kibana | from 8.0.0 before 8.16.3; from 8.17.0 before 8.17.2 | NVD |
References
- https://discuss.elastic.co/t/kibana-8-16-3-8-17-2-security-update-esa-2026-51/387446vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.