{"id":"CVE-2026-66748","title":"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…","summary":"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…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"published":"2026-07-28","updated":"2026-07-31","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66748","references":[{"url":"https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/","label":"disclosure@vulncheck.com"},{"url":"https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f","label":"disclosure@vulncheck.com"},{"url":"https://github.com/owen2345/camaleon-cms/pull/1136","label":"disclosure@vulncheck.com"},{"url":"https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2","label":"disclosure@vulncheck.com"},{"url":"https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field","label":"disclosure@vulncheck.com"},{"url":"https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field","label":"disclosure@vulncheck.com"},{"url":"https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","exploit-available"],"epss":0.00834,"epssPercentile":0.55692,"ingestedAt":"2026-08-01T21:14:39.393Z","exploits":{"github":1,"githubRepos":["https://github.com/theopaid/CVE-2026-66748-Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field"],"checkedAt":"2026-09-21T15:30:11.095Z"},"exploitAvailable":true,"slug":"CVE-2026-66748","body":"## Overview\n\nCamaleon 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":5411,"id":"CVE-2026-66748","ts":1788887281341,"field":"exploit_available","old":"false","new":"true"},{"seq":4294,"id":"CVE-2026-66748","ts":1788886395234,"field":"exploit_available","old":"true","new":"false"},{"seq":3043,"id":"CVE-2026-66748","ts":1788883058970,"field":"exploit_available","old":"false","new":"true"},{"seq":2072,"id":"CVE-2026-66748","ts":1788882463711,"field":"exploit_available","old":"true","new":"false"},{"seq":1145,"id":"CVE-2026-66748","ts":1788881900167,"field":"exploit_available","old":"false","new":"true"}]}