CVE-2026-42400 json
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
published 2026-05-28 5 mo ago modified 2026-10-14 25 d ago also BIT-elk-2026-42400 , BIT-kibana-2026-42400 , EUVD-2026-33030
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.
Patch / fix
- bitnami elk 8.19.16, 9.3.5, 9.4.2
- bitnami kibana 8.19.16, 9.3.5, 9.4.2
- elastic kibana 8.19.16, 9.3.5, 9.4.2
- elasticsearch kibana 8.19.16, 9.3.5, 9.4.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | elk | >=8.0.0, <8.19.16 >=9.0.0, <9.3.5 >=9.4.0, <9.4.2 |
8.19.16 9.3.5 9.4.2 |
| bitnami | kibana | >=8.0.0, <8.19.16 >=9.0.0, <9.3.5 >=9.4.0, <9.4.2 |
8.19.16 9.3.5 9.4.2 |
Affected products
- Elastic Kibana
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
discuss.elastic.co
/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42400
web
Sources
- CVE List CVE-2026-42400
- NVD CVE-2026-42400
- OSV BIT-elk-2026-42400
- OSV BIT-kibana-2026-42400
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.