Medium 5.3Published Mar 20, 2026

CVE-2026-33221Nhost is an open source Firebase alternative with GraphQL.

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects nhost storage. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for nhost storage

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-343, CWE-345
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nhost storage nhost:storage	before 0.12.0	NVD

References

https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85patch
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.