CVE•Published 2026-03-20•Modified 2026-06-03•0 articles on news•6 live references•NVD data

CVE-2026-33221Nhost · Storage

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS percentile

Exploit Prediction Scoring System · top 99% of all CVEs

Weaknesses (CWE)

CWE-343Predictable Value Range from Previous Values CWE-345Insufficient Verification of Data Authenticity

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.

Timeline

Published 2026-03-20

Modified 2026-06-03

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-33221

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Nhost Storage"

All exposed Nhost Storage instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Storage"

HTTP body or banner mentions "Storage" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-33221