{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.20.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6c4dda66863adc067152148dff5c2f56aaa2c343"
            }
          ],
          "repo": "https://github.com/code16/sharp",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fr76-5637-w3g9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-434"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33687.json"
  },
  "details": "Sharp is a content management framework built for Laravel as a package. Versions prior to 9.20.0 contain a vulnerability in the file upload endpoint that allows authenticated users to bypass all file type restrictions. The upload endpoint within the `ApiFormUploadController` accepts a client-controlled `validation_rule` parameter. This parameter is directly passed into the Laravel validator without sufficient server-side enforcement. By intercepting the request and sending `validation_rule[]=file`, an attacker can completely bypass all MIME type and file extension restrictions. This issue has been addressed in version 9.20.0 by removing the client-controlled validation rules and strictly defining upload rules server-side. As a workaround, ensure that the storage disk used for Sharp uploads is strictly private. Under default configurations, an attacker cannot directly execute uploaded PHP files unless a public disk configuration is explicitly used.",
  "id": "CVE-2026-33687",
  "modified": "2026-04-01T23:10:15.694606956Z",
  "published": "2026-03-26T21:47:55.573Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33687.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/code16/sharp/pull/714"
    },
    {
      "type": "WEB",
      "url": "https://github.com/code16/sharp/releases/tag/v9.20.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/code16/sharp/security/advisories/GHSA-fr76-5637-w3g9"
    },
    {
      "type": "WEB",
      "url": "https://laravel.com/docs/13.x/filesystem"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33687"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sharp has Unrestricted File Upload via Client-Controlled Validation Rules"
}