FKIE_CVE-2026-23885

Vulnerability from fkie_nvd - Published: 2026-01-19 22:16 - Updated: 2026-06-17 10:22
Severity
6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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()`.
References
security-advisories@github.comhttps://github.com/AlchemyCMS/alchemy_cms/commit/55d03ec600fd9e07faae1138b923790028917d26Patch
security-advisories@github.comhttps://github.com/AlchemyCMS/alchemy_cms/commit/563c4ce45bf5813b7823bf3403ca1fc32cb769e7Patch
security-advisories@github.comhttps://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.12Release Notes
security-advisories@github.comhttps://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.3Release Notes
security-advisories@github.comhttps://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-2762-657x-v979Vendor Advisory
Impacted products
Vendor Product Version
alchemy-cms alchemy_cms *
alchemy-cms alchemy_cms *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "alchemy_cms",
          "vendor": "AlchemyCMS",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.4.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0.a, \u003c 8.0.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:alchemy-cms:alchemy_cms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6F247A42-8A2A-4EB9-98D9-6D29401B36FF",
              "versionEndExcluding": "7.4.12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:alchemy-cms:alchemy_cms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7950D68F-3FA8-4C37-8AC4-0F0D8D5B9110",
              "versionEndExcluding": "8.0.3",
              "versionStartIncluding": "8.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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()`."
    },
    {
      "lang": "es",
      "value": "Alchemy es un motor de sistema de gesti\u00f3n de contenido de c\u00f3digo abierto escrito en Ruby on Rails. Antes de las versiones 7.4.12 y 8.0.3, la aplicaci\u00f3n utiliza la funci\u00f3n `eval()` de Ruby para ejecutar din\u00e1micamente una cadena proporcionada por el atributo `resource_handler.engine_name` en `Alchemy::ResourcesHelper#resource_url_proxy`. La vulnerabilidad existe en `app/helpers/alchemy/resources_helper.rb` en la l\u00ednea 28. El c\u00f3digo omite expl\u00edcitamente el an\u00e1lisis de seguridad con `# rubocop:disable Security/Eval`, indicando que el uso de una funci\u00f3n peligrosa era conocido pero no mitigado adecuadamente. Dado que `engine_name` se obtiene de definiciones de m\u00f3dulos que pueden ser influenciadas por configuraciones de administraci\u00f3n, permite a un atacante autenticado escapar de la sandbox de Ruby y ejecutar comandos de sistema arbitrarios en el sistema operativo anfitri\u00f3n. Las versiones 7.4.12 y 8.0.3 solucionan el problema reemplazando `eval()` por `send()`."
    }
  ],
  "id": "CVE-2026-23885",
  "lastModified": "2026-06-17T10:22:15.387",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.9,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23885",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-21T21:08:44.539151Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-19T22:16:02.453",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/AlchemyCMS/alchemy_cms/commit/55d03ec600fd9e07faae1138b923790028917d26"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/AlchemyCMS/alchemy_cms/commit/563c4ce45bf5813b7823bf3403ca1fc32cb769e7"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.12"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.3"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-2762-657x-v979"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-95"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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