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CVE-2026-27760

8.1 · HIGH

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 statemen…

Published Apr 28, 2026CWE-94EPSS 3.43%

Overview

CVE-2026-27760 is a high-severity vulnerability. It was published on April 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refchocapikk.com/posts/2026/opencats-installer-rce/GitHubgithub.com/opencats/OpenCATS/blob/46e4727/lib/CATSUtility.php#L142-L172GitHubgithub.com/opencats/OpenCATS/blob/46e4727/modules/install/ajax/ui.php#L130GitHubgithub.com/opencats/OpenCATS/commit/3002a29f4c3cada1aa2c4f3d4ae4e189906606b6GitHubgithub.com/opencats/OpenCATS/pull/706Refwww.vulncheck.com/advisories/opencats-php-code-injection-via-installer-ajax-endpoint

How CyberStrike helps

Frequently asked questions

What is CVE-2026-27760?

CVE-2026-27760 is a high-severity vulnerability. It was published on April 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-27760?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-27760?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-27760?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-27760 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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