{"id":"GHSA-hj85-ph9q-78jg","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)).","aliases":["CVE-2026-47387"],"modified":"2026-07-20T21:30:39.726401045Z","published":"2026-06-05T16:20:44Z","database_specific":{"nvd_published_at":"2026-06-23T21:17:00Z","cwe_ids":["CWE-79"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-06-05T16:20:44Z"},"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"}],"affected":[{"package":{"name":"nocodb","ecosystem":"npm","purl":"pkg:npm/nocodb"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.05.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2026.05.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-hj85-ph9q-78jg/GHSA-hj85-ph9q-78jg.json"}}],"schema_version":"1.9.0","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"}]}