CVE-2026-26934 — Improper Validation of Specified Quantity in Input in Kibana

CWE-1284 — Improper Validation of Specified Quantity in Input4 documents4 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 80.07%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Elastic Kibana
Timeline
PublishedFeb 26

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶NVDelastic/kibana8.18.0 — 8.19.12+2
▶CVEListV5elastic/kibana8.18.0 — 8.19.11+2

🔴Vulnerability Details

2
GHSA
GHSA-vvxg-3v44-fpqx: Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denia↗2026-02-26
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CVEList
Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service↗2026-02-26
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🕵️Threat Intelligence

1
Wiz
CVE-2026-26934 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-26934 — Elastic Kibana vulnerability | cvebase