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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nhost | Storage | < 0.12.0 |
Related Weaknesses (CWE)
References
- https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85Patch
- https://github.com/nhost/nhost/pull/4018Issue TrackingPatch
- https://github.com/nhost/nhost/releases/tag/storage%400.12.0ProductRelease Notes
- https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffmMitigationVendor Advisory
FAQ
What is CVE-2026-33221?
CVE-2026-33221 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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?
CVE-2026-33221 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33221?
Check the references section above for vendor advisories and patch information. Affected products include: Nhost Storage.