Authenticated Remote Code Execution in Camaleon CMS by The Vendor
CVE-2026-66748

8.7HIGH

Key Information:

Vendor

Owen2345

Status
Camaleon-cms
Vendor
CVE Published:
28 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-66748?

Camaleon CMS versions 2.1.1 through 2.9.1 exhibit a security flaw that allows users with specific permissions to execute arbitrary Ruby code. This vulnerability arises from the 'select_eval' custom field type, which permits the storage of malicious Ruby expressions. When a post edit page is rendered, these expressions are evaluated within an ERB view context, allowing an attacker to gain server-side execution privileges. This exploitation could potentially lead to unauthorized actions within the web application's environment.

Affected Version(s)

camaleon-cms 2.1.1 <= 2.9.1

camaleon-cms 2.1.1 <= 2.9.1

camaleon-cms 2.9.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-66748 - Proof of Concept

References

https://github.com/theopaid/Camaleon-CMS---Authenticated-...
technical-descriptionexploit
https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2
release-notes
https://github.com/owen2345/camaleon-cms/pull/1136
issue-tracking

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Theodosis Paidakis
.