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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85
security-advisories@github.com
https://github.com/nhost/nhost/pull/4018
security-advisories@github.com
https://github.com/nhost/nhost/releases/tag/storage%400.12.0
security-advisories@github.com
https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm
security-advisories@github.com