CVE-2026-66748

Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field

Published Jul 28, 2026 CVSS 4.0 · 8.7 High EPSS 1.1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Tuzitio
Tuzitio camaleon Cms
CPEs cpe:2.3:a:tuzitio:camaleon_cms:*:*:*:*:*:*:*:*
cpe:2.3:a:tuzitio:camaleon_cms:2.9.2:*:*:*:*:*:*:*
Vendors & Products Tuzitio
Tuzitio camaleon Cms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Owen2345
Owen2345 camaleon Cms
Vendors & Products Owen2345
Owen2345 camaleon Cms
Type Values Removed Values Added
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.
Title Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:08 PM
Reserved
Jul 27, 2026, 4:27 PM
Status
Deferred
Published
Jul 28, 2026, 4:20 PM
Modified
Oct 24, 2026, 1:10 PM