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Vulnerabilities

Vulnerability · CVE-2026-27760

opencats opencats Improper Control of Generation of Code ('Code Injection')

Published Apr 28, 2026 · catalog updated Jul 14, 2026 · opencats opencats Improper Control

Patch now

CVE-2026-27760 is in the CISA known-exploited catalog. Confirm opencats opencats Improper Control against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (opencats opencats Improper Control).
  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.2
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
3.43%
Remediation
Remediation guidance
Affected products
vendor opencats opencats

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. VulnCheck canary evidence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor opencats opencatsversion unspecified

How to fix CVE-2026-27760

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-27760 is in the CISA known-exploited catalog. Confirm opencats opencats Improper Control against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-94: Code Injection. EPSS 3.43%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 28, 2026 · NIST NVD

    Detected

    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 pers

  2. Jun 17, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. Jul 14, 2026 · NIST NVD

    Updated

    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 pers

Sources

  • CVE.orgVulnerability recordCVE-2026-27760

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-27760

    30-day exploitation probability 3.4%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/opencats_installer_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2026-27760

    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 d

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2026-27760

    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 d

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.