CVE-2026-27760 - Vulnerability Analysis
HighCVSS: 8.1Last Updated: April 28, 2026
OpenCATS - Command Injection
Published: April 28, 2026Updated: April 28, 2026Remote Exploitable
Overview
OpenCATS prior to commit 3002a29 contains a command injection caused by injection of PHP statements into the installer AJAX endpoint's databaseConnectivity action parameter, letting unauthenticated attackers execute arbitrary code, exploit requires incomplete installation wizard.
Severity & Score
Severity: High
CVSS Score: 8.1
Impact
Unauthenticated attackers can execute arbitrary PHP code remotely, leading to full system compromise.
Mitigation
Update to the version after commit 3002a29 or latest available version.
References
- https://github.com/opencats/OpenCATS/blob/46e4727/lib/CATSUtility.php#L142-L172
- https://github.com/opencats/OpenCATS/blob/46e4727/modules/install/ajax/ui.php#L130
- https://github.com/opencats/OpenCATS/commit/3002a29f4c3cada1aa2c4f3d4ae4e189906606b6
- https://github.com/opencats/OpenCATS/pull/706
- https://www.vulncheck.com/advisories/opencats-php-code-injection-via-installer-ajax-endpoint
- https://chocapikk.com/posts/2026/opencats-installer-rce/
Related Resources
Details
- CVE ID
- CVE-2026-27760
- Severity
- High
- CVSS Score
- 8.1
- Type
- command_injection
- Status
- new
CWE
- CWE-94
CVSS Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H