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Vulnerabilities CVE-2026-66748

CVE-2026-66748

High
Open
TLP:CLEAR

Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field

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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.

Details

CVSS Score
8.7
EPSS Score
0.80%

53.4th percentile

CVSS 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
Confidence
90%
Published
Jul 28, 2026
Last Modified
Jul 31, 2026
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