CVE-2026-23885

Description

Alchemy is an open source content management system engine written in Ruby on Rails. Prior to versions 7.4.12 and 8.0.3, the application uses the Ruby eval() function to dynamically execute a string provided by the resource_handler.engine_name attribute in Alchemy::ResourcesHelper#resource_url_proxy. The vulnerability exists in app/helpers/alchemy/resources_helper.rb at line 28. The code explicitly bypasses security linting with # rubocop:disable Security/Eval, indicating that the use of a dangerous function was known but not properly mitigated. Since engine_name is sourced from module definitions that can be influenced by administrative configurations, it allows an authenticated attacker to escape the Ruby sandbox and execute arbitrary system commands on the host OS. Versions 7.4.12 and 8.0.3 fix the issue by replacing eval() with send().

Risk Information

Base Score

6.4

MODERATE

Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Score

Exploitation Probability

0.009

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2026-23885 are fixed in Ruby-alchemy_cms 7.4.12	Windows
Vulnerabilities CVE-2026-23885 are fixed in Ruby-alchemy_cms 8.0.3	Windows
Vulnerabilities CVE-2026-23885 are fixed in Ruby-alchemy_cms for Linux 7.4.12	Linux
Vulnerabilities CVE-2026-23885 are fixed in Ruby-alchemy_cms for Linux 8.0.3	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234