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CVE-2026-66748— Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field

Quick assessment

Affected
owen2345 camaleon-cms
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.

Owen Peredo Diaz CAMALEON CMS是Owen Peredo Diaz个人开发者开源的一款内容管理系统。 Owen Peredo Diaz CAMALEON CMS 2.1.1版本至2.9.1版本存在代码注入漏洞，该漏洞源于允许具有custom_fields管理权限的用户通过select_eval自定义字段类型提供恶意表达式，在渲染编辑页面时通过instance_eval执行任意Ruby代码，实现服务器端代码执行。

CVSS 8.8 · High EPSS 1.14% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
owen2345 camaleon-cms 2.1.1≤ 2.9.1 affected
2.9.2 affected
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I. Basic Information for CVE-2026-66748

Vulnerability Information
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Vulnerability Title
Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field
Source: CVE Program / CVE List V5
Vulnerability Description
Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select_eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance_eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Owen Peredo Diaz CAMALEON CMS 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Owen Peredo Diaz CAMALEON CMS是Owen Peredo Diaz个人开发者开源的一款内容管理系统。 Owen Peredo Diaz CAMALEON CMS 2.1.1版本至2.9.1版本存在代码注入漏洞，该漏洞源于允许具有custom_fields管理权限的用户通过select_eval自定义字段类型提供恶意表达式，在渲染编辑页面时通过instance_eval执行任意Ruby代码，实现服务器端代码执行。
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
owen2345 camaleon-cms 2.1.1 ~ 2.9.1 -

II. Public POCs for CVE-2026-66748

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7025 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-66748

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Vendor Advisories for CVE-2026-66748 (1)

Proof of Concept for CVE-2026-66748 (1)

Security Blog Posts for CVE-2026-66748 (2)

Vendor Pages for CVE-2026-66748 (1)

IV. Related Vulnerabilities

Same product: camaleon-cms
Same vendor: owen2345
Same weakness: CWE-94