CVE-2026-78581 json
Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana
published 2mo ago modified 2mo ago also BIT-elk-2026-78581 , BIT-kibana-2026-78581 , EUVD-2026-65489
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami elk 8.16.3, 8.17.2
- bitnami kibana 8.16.3, 8.17.2
- elastic kibana 8.16.3, 8.17.2
- elasticsearch kibana 8.16.3, 8.17.2
Is CVE-2026-78581 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | elk | >=8.0.0, <8.16.3 >=8.17.0, <8.17.2 |
8.16.3 8.17.2 |
| bitnami | kibana | >=8.0.0, <8.16.3 >=8.17.0, <8.17.2 |
8.16.3 8.17.2 |
Affected products
- Elastic Kibana
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
discuss.elastic.co
/t/kibana-8-16-3-8-17-2-security-update-esa-2026-51/387446
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-78581
web
Sources
- CVE List CVE-2026-78581
- NVD CVE-2026-78581
- OSV BIT-elk-2026-78581
- OSV BIT-kibana-2026-78581
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.