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CVE-2026-66748

HIGH Exploitation: PoC
8.8
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-66748
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-27 16:27 UTC
Published
2026-07-28 15:19 UTC
Last updated
2026-07-28 19:27 UTC
Primary CWE
CWE-94
Improper Control of Generation of Code ('Code Injection')
Vendor / Product
owen2345 / camaleon-cms
Sources
cve.org  ·  NVD

Severity & Metrics

8.8 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
owen2345 camaleon-cms — 2.1.1 ≤ 2.9.1, 2.9.2
Weakness (CWE)
CWESourceDescription
CWE-94 cna Improper Control of Generation of Code ('Code Injection')
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.8 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 HIGH 4.0 cna 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
References (5)
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