CVE-2026-66748
Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-94 |
| Vendor | owen2345 |
| Product | camaleon-cms |
| Published | Jul 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
owen2345 / camaleon-cms
2.1.1 ≤ 2.9.1 2.9.2
References
github.com: https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field github.com: https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2 github.com: https://github.com/owen2345/camaleon-cms/pull/1136 github.com: https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f vulncheck.com: https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field
Credits
Theodosis Paidakis