Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data

published 2026-09-26 43 d ago modified 2026-10-01 38 d ago also BIT-elk-2026-72662 , BIT-kibana-2026-72662 , EUVD-2026-87793

cvss: 6.3; 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 7%
public exploits: 0; none known

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user granted the Timeline feature privilege in a Kibana space could enumerate, read, modify, and delete draft Timeline objects belonging to other users in the same space. Read access is sufficient for enumeration and disclosure; the Timeline write privilege is required for modification and deletion.

Patch / fix

fixed in 4

bitnami elk 8.19.22, 9.4.6
bitnami kibana 8.19.22, 9.4.6
elasticsearch kibana 8.19.22, 9.4.6
elastic kibana 8.19.22, 9.4.6

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 43 d ago (2026-09-26)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
OSV	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
bitnami	elk	>=8.0.0, <8.19.22 >=9.0.0, <9.4.6	8.19.22 9.4.6
bitnami	kibana	>=8.0.0, <8.19.22 >=9.0.0, <9.4.6	8.19.22 9.4.6

Affected products

Elastic Kibana

Classification

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

References

Sources

Fencer Vulns 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.

Summary