GHSA-FXP3-G6GW-4R4V

Vulnerability from github – Published: 2026-02-09 20:36 – Updated: 2026-02-09 22:39
VLAI?
Summary
Craft CMS: GraphQL Asset Mutation Privilege Escalation
Details

There is a Privilege Escalation vulnerability in Craft CMS’s GraphQL API that allows an authenticated user with write access to one asset volume to escalate their privileges and modify/transfer assets belonging to any other volume, including restricted or private volumes to which they should not have access.

Summary:

Type: Privilege Escalation (CWE-269) Affected: Craft CMS 5.x (likely affects 4.x and 3.x as well) Location: src/gql/resolvers/mutations/Asset.php lines 57-107

Root Cause:

The saveAsset GraphQL mutation validates authorization against the schema-resolved volume but fetches the target asset by ID without verifying that the asset belongs to the authorized volume. This allows unauthorized cross-volume asset modification and transfer.

Impact:

  • Transfer confidential assets from private volumes to public volumes (data exfiltration)
  • Modify asset metadata in restricted volumes
  • Bypass multi-tenant isolation in shared hosting environments
Severity ?
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "fixed": "5.9.0-beta.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-RC1"
            },
            {
              "fixed": "4.17.0-beta.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25497"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-09T20:36:24Z",
    "nvd_published_at": "2026-02-09T20:15:58Z",
    "severity": "HIGH"
  },
  "details": "There is a Privilege Escalation vulnerability in Craft CMS\u2019s GraphQL API that allows an authenticated user with write access to one asset volume to escalate their privileges and modify/transfer assets belonging to any other volume, including restricted or private volumes to which they should not have access.\n\n## Summary:\n\nType: Privilege Escalation (CWE-269)\nAffected: Craft CMS 5.x (likely affects 4.x and 3.x as well)\nLocation: `src/gql/resolvers/mutations/Asset.php lines 57-107`\n\n## Root Cause:\n\nThe saveAsset GraphQL mutation validates authorization against the schema-resolved volume but fetches the target asset by ID without verifying that the asset belongs to the authorized volume. This allows unauthorized cross-volume asset modification and transfer.\n\n## Impact:\n\n- Transfer confidential assets from private volumes to public volumes (data exfiltration)\n- Modify asset metadata in restricted volumes\n- Bypass multi-tenant isolation in shared hosting environments",
  "id": "GHSA-fxp3-g6gw-4r4v",
  "modified": "2026-02-09T22:39:11Z",
  "published": "2026-02-09T20:36:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-fxp3-g6gw-4r4v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25497"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/ac7edf868c1a81fd9c4dc49d3b3edf1cce113409"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/4.17.0-beta.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.8.22"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.9.0-beta.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS: GraphQL Asset Mutation Privilege Escalation"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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