CVE-2026-26934 json
Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service
published 2026-02-26 8 mo ago modified 2026-09-08 2 mo ago also BIT-elk-2026-26934 , BIT-kibana-2026-26934 , EUVD-2026-8863
- 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 24%
- public exploits
- 0
- none known
Summary
Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted, malformed payload causing excessive resource consumption and resulting in Kibana becoming unresponsive or crashing.
Patch / fix
- bitnami elk 8.19.12, 9.2.6, 9.3.1
- bitnami kibana 8.19.12, 9.2.6, 9.3.1
- elastic kibana 8.19.12, 9.2.6, 9.3.1
- elasticsearch kibana 8.19.12, 9.2.6, 9.3.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% 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 | >=8.18.0, <8.19.12 >=9.0.0, <9.2.6 >=9.3.0, <9.3.1 |
8.19.12 9.2.6 9.3.1 |
| bitnami | kibana | >=8.18.0, <8.19.12 >=9.0.0, <9.2.6 >=9.3.0, <9.3.1 |
8.19.12 9.2.6 9.3.1 |
Affected products
- Elastic Kibana
Classification
- Weakness
-
- CWE-1284 Improper Validation of Specified Quantity in Input
References
-
discuss.elastic.co
/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-12/385248
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26934
web
Sources
- CVE List CVE-2026-26934
- NVD CVE-2026-26934
- OSV BIT-elk-2026-26934
- OSV BIT-kibana-2026-26934
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.