SB2026070217 - Input validation error in Kibana
Published: July 2, 2026
Security Bulletin ID
SB2026070217
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2026-56151)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input validation in Fleet policy input handling when processing a specially crafted Fleet policy input. A remote user can submit a specially crafted Fleet policy input to cause a denial of service.
Only deployments that use Fleet are vulnerable.
Remediation
Install update from vendor's website.