Vulnerability Description
Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.12.0, the storage service's file upload handler trusts the client-provided Content-Type header without performing server-side MIME type detection. This allows an attacker to upload files with an arbitrary MIME type, bypassing any MIME-type-based restrictions configured on storage buckets. This issue has been patched in version 0.12.0.
Related Weaknesses (CWE)
References
- https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85
- https://github.com/nhost/nhost/pull/4018
- https://github.com/nhost/nhost/releases/tag/storage%400.12.0
- https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm
FAQ
What is CVE-2026-33221?
CVE-2026-33221 is a documented vulnerability. Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.12.0, the storage service's file upload handler trusts the client-provided Content-Type header without performing server-s...
How severe is CVE-2026-33221?
CVSS scoring is not yet available for CVE-2026-33221. Check NVD for updates.
Is there a patch for CVE-2026-33221?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.