CVE-2026-33221

low

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

https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm

https://github.com/nhost/nhost/releases/tag/storage%400.12.0

https://github.com/nhost/nhost/pull/4018

https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85

Details

Source: Mitre, NVD

Published: 2026-03-20

Updated: 2026-03-23

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 2.1

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Severity: Low

EPSS

EPSS: 0.00007