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CVE-2026-27760— OpenCATS PHP Code Injection via installer AJAX endpoint

Quick assessment

Affected
opencats OpenCATS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenCats是OpenCats开源的一套开源的招聘流程管理系统。 OpenCats存在代码注入漏洞，该漏洞源于安装程序AJAX端点存在PHP代码注入，可能导致未经身份验证的攻击者通过向databaseConnectivity操作参数注入PHP语句执行任意代码，攻击者可以利用单引号和语句分隔符跳出config.php中define()字符串环境，注入恶意PHP代码，在安装向导未完成时每次页面加载时持久执行。

CVSS 8.1 · High EPSS 3.43% · P89

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
opencats OpenCATS ≤ 0.9.7.4 affected
3002a29f4c3cada1aa2c4f3d4ae4e189906606b6 unaffected
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I. Basic Information for CVE-2026-27760

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
OpenCATS PHP Code Injection via installer AJAX endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenCats 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenCats是OpenCats开源的一套开源的招聘流程管理系统。 OpenCats存在代码注入漏洞，该漏洞源于安装程序AJAX端点存在PHP代码注入，可能导致未经身份验证的攻击者通过向databaseConnectivity操作参数注入PHP语句执行任意代码，攻击者可以利用单引号和语句分隔符跳出config.php中define()字符串环境，注入恶意PHP代码，在安装向导未完成时每次页面加载时持久执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opencats OpenCATS 0 ~ 0.9.7.4 -

II. Public POCs for CVE-2026-27760

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27760.yaml POC Details
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III. Intelligence Information for CVE-2026-27760

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Patches & Fixes for CVE-2026-27760 (3)

Vendor Advisories for CVE-2026-27760 (1)

Security Blog Posts for CVE-2026-27760 (1)

IV. Related Vulnerabilities

Same product: OpenCATS
Same vendor: opencats
Same weakness: CWE-94

V. Comments for CVE-2026-27760

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