CVE-2026-33221

MEDIUM

Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload

Title source: cna
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 5.3
EPSS 0.0017
EPSS Percentile 7.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-343 CWE-345
Status published
Products (3)
nhost/nhost 0 - 0.0.0-20260318074820-c4bd53f042d7Go
nhost/nhost < 0.12.0
nhost/storage < 0.12.0
Published Mar 20, 2026
Tracked Since Mar 21, 2026