{"id":"CVE-2026-66748","aliases":["EUVD-2026-49871","GHSA-7xm9-634w-f5r7"],"status":"published","title":"Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field","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.","severity":{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01135,"percentile":0.66733,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-94"],"published":"2026-07-28T15:19:52Z","modified":"2026-11-09T02:47:16Z","exploits":[{"source":"pocgithub","id":"theopaid/CVE-2026-66748-Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field","title":"theopaid/CVE-2026-66748-Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field","date":"2026-07-24","url":"https://github.com/theopaid/CVE-2026-66748-Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field"}],"products":[{"vendor":"owen2345","product":"camaleon-cms"}],"references":[{"url":"https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/","tags":["technical-description","exploit","evidence"]},{"url":"https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/","tags":["technical-description","exploit","evidence"]},{"url":"https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field","tags":["exploit","technical-description","evidence"]},{"url":"https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2","tags":["release-notes","advisory"]},{"url":"https://github.com/owen2345/camaleon-cms/pull/1136","tags":["issue-tracking","patch","fix"]},{"url":"https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f","tags":["patch","fix"]},{"url":"https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66748","tags":["advisory"]},{"url":"https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval"},{"url":"https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties"},{"url":"https://github.com/advisories/GHSA-7xm9-634w-f5r7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66748.json","tags":["advisory"]},{"url":"https://github.com/owen2345/camaleon-cms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-66748","title":"Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field","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.","status":"published","published":"2026-07-28T15:19:52.609Z","modified":"2026-11-08T14:08:06.902Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-94"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-49871","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.","status":"published","published":"2026-07-28T15:19:52Z","modified":"2026-11-08T14:08:06Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-08T15:13:07.123106Z"}],"ghsa":[{"id":"GHSA-7xm9-634w-f5r7","title":"Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution...","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.","status":"published","published":"2026-07-28T18:33:02Z","modified":"2026-07-31T21:31:51Z","cvss":[{"version":"4.0","score":8.7,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:10:00.950607Z"}],"nvd":[{"id":"CVE-2026-66748","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.","status":"published","published":"2026-07-28T16:20:16.31Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"4.0","score":8.7,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:12:33.249634Z"}],"osv":[{"id":"CVE-2026-66748","title":"Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field","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.","status":"published","published":"2026-07-28T15:19:52.609Z","modified":"2026-11-09T02:47:16.313032213Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-09T03:16:17.543303Z"}]}}