CVE-2026-47387: NocoDB Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hj85-ph9q-78jg",
  "modified" : "2026-07-20T21:19:06Z",
  "published" : "2026-06-05T16:20:44Z",
  "aliases" : [ "CVE-2026-47387" ],
  "summary" : "NocoDB: Stored Cross-Site Scripting via Form View Redirect URL",
  "details" : "### Summary\n\nThe shared form-view submit handler in NocoDB writes the form's `redirect_url` to `window.location.href` after a same-host check that does not validate the URL scheme. A user with `editor` role (or above) on any base can plant a `javascript:` URL in the form's `redirect_url`; when an authenticated viewer opens the share-link and submits the form, the payload executes in the NocoDB origin and can read the session token from `localStorage[\"nocodb-gui-v2\"]`.\n\n### Details\n\nThe vulnerable sink is in `packages/nc-gui/composables/useSharedFormViewStore.ts`:\n\n- `isValidRedirectUrl` validated only `typeof === 'string'` and non-empty trim — no scheme check.\n- The submit branch built an anchor element, compared `anchor.host` to `window.location.host`, and either pushState-reloaded (same host) or assigned `window.location.href = redirectUrl` (otherwise).\n- For non-network schemes such as `javascript:`, `data:`, `vbscript:`, and `file:`, `anchor.host` is the empty string, so the same-host check is false and the code falls into the external-redirect branch — executing the URL same-origin in the NocoDB tab.\n\nThe `redirect_url` field is writable by any user with `editor` role on the base via the form-view PATCH endpoint, and the value is returned verbatim by the public shared-view meta endpoint, so no further privilege is required to weaponize a public form share.\n\n### Impact\n\n- **Same-origin script execution in the viewer's NocoDB tab.** The payload runs in the NocoDB origin and can read the session token at `localStorage[\"nocodb-gui-v2\"].token`.\n- **Action under the viewer's identity.** With the token, an attacker can call authenticated APIs as the viewer, scoped to whatever workspaces, bases, and operations that viewer is permitted to use.\n- **Single-click viewer flow.** Form share-links are the intended distribution channel for forms, so the phishing surface is on-brand; the form can be configured with a single hidden pre-filled required field to reduce the viewer flow to one click.\n\n### Credit\n\nThis issue was reported by [@kah-ja](https://github.com/kah-ja) ([turingpoint.de](https://turingpoint.de)).",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nocodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.05.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.05.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nocodb/nocodb/security/advisories/GHSA-hj85-ph9q-78jg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47387"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nocodb/nocodb"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nocodb/nocodb/releases/tag/2026.05.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-05T16:20:44Z",
    "nvd_published_at" : "2026-06-23T21:17:00Z"
  }
}