CVE-2026-33221
Last modified
CVE-2026-33221 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nhost | Storage | < 0.12.0 |
References
- https://github.com/nhost/nhost/pull/4018Issue Tracking, Patch
- https://github.com/nhost/nhost/releases/tag/storage%400.12.0Product, Release Notes
- https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffmMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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