CVE-2026-27760criticalobserved exploitationCWE-94

CVE-2026-27760: critical vulnerability in OpenCATS

OpenCATS PHP Code Injection via installer AJAX endpoint

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97Vexday Risk Score

Patch now. It exploitation observed by VulnCheck and has a working public exploit.

ssvc Actcvss 9.2epss 33%
from disclosure to weaponsame day
Published on NVDApr 28
metasploitApr 28
VulnCheck+50d
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.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
opencats · OpenCATS
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