CVE-2026-27760

CVE-2026-27760 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 1 public exploit from researchers including Chocapikk, stlthr4k3r, including a Metasploit module exploits/multi/http/opencats_installer_rce. A Nuclei detection template is also available.

AI-analyzed exploit summary This Metasploit module exploits an unauthenticated PHP code injection vulnerability in the OpenCATS installer's AJAX endpoint (CVE-2026-27760). The exploit injects an eval() backdoor into config.php by abusing unsanitized user input in the databaseConnectivity action, then triggers remote command execution via the backdoor.

OpenCATS prior to commit 3002a29 contains a PHP code injection vulnerability in the installer AJAX endpoint that allows unauthenticated attackers to execute arbitrary code by injecting PHP statements into the databaseConnectivity action parameter. Attackers can break out of the define() string context in config.php using a single quote and statement separator to inject malicious PHP code that persists and executes on every subsequent page load when the installation wizard remains incomplete.