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Advisory details: ruby_advisory_db / gems/camaleon_cms/CVE-2026-66748
Advisory ID ruby_advisory_db/gems/camaleon_cms/CVE-2026-66748
Aliases CVE-2026-66748
GHSA-7xm9-634w-f5r7
Summary Camaleon CMS (2.1.1 to 2.9.1) contains an authenticated RCE vulnerability Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution (RCE) 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
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3 8.8
cvssv4 8.7
Reference id Reference type URL
CVE-2026-66748 https://nvd.nist.gov/vuln/detail/CVE-2026-66748
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-07-28T19:26:54Z/

Decision: Track*

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/66xxx/CVE-2026-66748.json

Source Advisory: vulnrichment/CVE-2026-66748

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]