{"cve":"CVE-2026-33221","nvd":{"published":"2026-03-20T23:16:46.163","modified":"2026-06-17T10:37:08.897","status":"Analyzed","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.","cvss_v4":{"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","score":2.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-343","CWE-345"],"references":["https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85","https://github.com/nhost/nhost/pull/4018","https://github.com/nhost/nhost/releases/tag/storage%400.12.0","https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm"],"products":["nhost:storage"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33221","score":0.0018,"percentile":0.07549,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-g9f6-9775-hffm","url":"https://osv.dev/vulnerability/GHSA-g9f6-9775-hffm","summary":"Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload","modified":"2026-06-09T12:00:12.447772351Z","packages":[{"ecosystem":"Go","name":"github.com/nhost/nhost","purl":"pkg:golang/github.com/nhost/nhost","ranges":["<0.0.0-20260318074820-c4bd53f042d7"],"fixed":["0.0.0-20260318074820-c4bd53f042d7"]}]},{"id":"GO-2026-4759","url":"https://osv.dev/vulnerability/GO-2026-4759","summary":"Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload in github.com/nhost/nhost","modified":"2026-03-23T18:45:21.069808Z","packages":[{"ecosystem":"Go","name":"github.com/nhost/nhost","purl":"pkg:golang/github.com/nhost/nhost","ranges":["<0.0.0-20260318074820-c4bd53f042d7"],"fixed":["0.0.0-20260318074820-c4bd53f042d7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}