CVE-2026-122006

Full vulnerability record from the local CVENow database.

Description

The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing occurs, can allow server read and write operations (e.g., reading secret_key_base) because the ImageMagick analyzer runs when a file is attached, and there is not an ImageMagick security policy to block unintended functionality.

Severity

CRITICAL

CVSS score

9.8 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-04 15:17:42.940000

Last modified

2026-11-04 15:17:42.940000

View original CVE JSON

{
  "id": "CVE-2026-122006",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-04T15:17:42.940",
  "lastModified": "2026-11-04T15:17:42.940",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing occurs, can allow server read and write operations (e.g., reading secret_key_base) because the ImageMagick analyzer runs when a file is attached, and there is not an ImageMagick security policy to block unintended functionality."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "rubyonrails",
          "product": "Active Storage",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:gem/activestorage",
          "versions": [
            {
              "version": "0",
              "lessThan": "8.0.5.2",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "8.1",
              "lessThan": "8.1.4.1",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1188"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rails/rails/releases/tag/v8.1.4.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rails/rails/security/advisories/GHSA-f3w6-w445-fwh9",
      "source": "[email protected]"
    }
  ]
}