#VU123319 Inefficient regular expression complexity in Kibana - CVE-2026-26936

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Main Vulnerability Database Vulnerabilities #VU123319

#VU123319 Inefficient regular expression complexity in Kibana - CVE-2026-26936

Published: February 27, 2026


Vulnerability identifier: #VU123319
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-26936
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Kibana
Software vendor:
Elastic Stack

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions. A remote user can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.


Remediation

Install updates from vendor's website.

External links