CVE-2026-23885

CRITICAL EPSS 34.1%
Published Jan 19, 20265mo ago · Modified Jun 17, 20262w ago
9.9 CVSS 3.1
Critical
Find Similar
Published Jan 19, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

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()`.

CVSS Details

Base Score
9.9
Exploitability
3.1
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
34.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-95

Affected Products 2

VendorProductVersionRange
alchemy-cmsalchemy_cms* <7.4.12
alchemy-cmsalchemy_cms*≥8.0.0  –  <8.0.3

References 5

  • github.com https://github.com/AlchemyCMS/alchemy_cms/commit/55d03ec600fd9e07faae1138b923790028917d26
    Patch
  • github.com https://github.com/AlchemyCMS/alchemy_cms/commit/563c4ce45bf5813b7823bf3403ca1fc32cb769e7
    Patch
  • github.com https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.12
    Release Notes
  • github.com https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.3
    Release Notes
  • github.com https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-2762-657x-v979
    Vendor Advisory

Remediation

  • github.com https://github.com/AlchemyCMS/alchemy_cms/commit/55d03ec600fd9e07faae1138b923790028917d26
    Patch
  • github.com https://github.com/AlchemyCMS/alchemy_cms/commit/563c4ce45bf5813b7823bf3403ca1fc32cb769e7
    Patch