CVE-2026-66748Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field
Updated under an hour ago ()
Does this affect you?
It affects owen2345 camaleon-cms. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
owen2345 camaleon-cms owen2345:camaleon_cms (from the name) | from 2.1.1 through 2.9.1; 2.9.2 | CNA record |
References
- https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/technical-description, exploit
- https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/technical-description, exploit
- https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Fieldexploit, technical-description
- https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2release-notes
- https://github.com/owen2345/camaleon-cms/pull/1136issue-tracking
- https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5fpatch
- https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-fieldthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.