CVE-2026-0543 — Improper Input Validation in Kibana

CWE-20 — Improper Input ValidationCWE-770 — Allocation of Resources Without Limits or Throttling5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 73.59%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Elastic Kibana
Timeline
PublishedJan 13

Description

Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.

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/kibana8.0.0 — 8.19.0+3
▶CVEListV5elastic/kibana8.0.0 — 8.19.9+3

🔴Vulnerability Details

2
CVEList
Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation↗2026-01-13
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GHSA
GHSA-p2g6-3qpg-4v6h: Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially↗2026-01-13
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📋Vendor Advisories

1
Red Hat
Kibana: Kibana: Denial of Service due to improper input validation in Email Connector↗2026-01-13
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🕵️Threat Intelligence

1
Wiz
CVE-2026-0543 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-0543 — Improper Input Validation in Elastic | cvebase