GHSA-6mhr-74x2-98v9 NocoDB: Stored Cross-Site Scripting via Secure Attachment

• npm nocodb: <= 0.301.3 (no fix yet)

Summary With `NC_SECURE_ATTACHMENTS=true`, an authenticated uploader could deliver `.html` or `.svg` attachments that the browser rendered inline from the NocoDB origin instead of forcing a download. Details The signed attachment handler stored response-header overrides under PascalCase keys (`ResponseContentDisposition`, `ResponseContentType`) while the controller that served the file read them under lowercase-hyphen names (`response-content-disposition`). The mismatch dropped the `Content-Disposition: attachment` header, leaving Express to auto-render `.html`, `.svg`, and similar inline. The fix corrects the key case and additionally forces `Content-Disposition: attachment` and `Content-Type: application/octet-stream` for any MIME type not on the preview allowlist. Impact Stored Cross-Site Scripting in the NocoDB origin from inline-rendered uploads. Script executing in the victim's browser can read the auth JWT from `localStorage`. Exploitation requires authenticated upload permission and the secure-attachment mode to be enabled. Credit This issue was reported by @bugbunny-research. It was independently reported by @DavidCarliez.