SEPTEMBER 18, 2026
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Case File

CVE-2026-54003

CRITICAL · CVSS 9.1 EPSS 0.55% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-09 · Last synced 2026-08-08

CyberRota Analysis

AI-Generated

Kirby content management systems prior to versions 4.9.4 and 5.4.4 are vulnerable when deployed on publicly accessible servers without configured user accounts, allowing remote attackers to exploit improperly trusted headers to install the Panel and create an initial admin user. This vulnerability poses a significant risk to sites that rely on reverse proxies for IP address handling. Organizations using affected versions should prioritize upgrading to the patched releases to mitigate unauthorized access risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-54003
Severity
CRITICAL
CVSS
9.1
EPSS
0.55%

Original NVD Description

Kirby is an open-source content management system. Prior to 4.9.4 and from 5.4.4, Kirby sites with no configured user accounts that run on publicly accessible servers behind a reverse proxy setting the Forwarded, X-Client-IP, or X-Real-IP request header could allow remote attackers to install the Panel and create the first admin user because local-IP checks trusted those headers incorrectly. This issue is fixed in versions 4.9.4 and 5.4.4.