{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33221","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-17T23:23:58.314Z","datePublished":"2026-03-20T23:00:18.342Z","dateUpdated":"2026-03-25T13:44:43.741Z"},"containers":{"cna":{"title":"Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload","problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-343","lang":"en","description":"CWE-343: Predictable Value Range from Previous Values","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.1,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm"},{"name":"https://github.com/nhost/nhost/pull/4018","tags":["x_refsource_MISC"],"url":"https://github.com/nhost/nhost/pull/4018"},{"name":"https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85","tags":["x_refsource_MISC"],"url":"https://github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85"},{"name":"https://github.com/nhost/nhost/releases/tag/storage%400.12.0","tags":["x_refsource_MISC"],"url":"https://github.com/nhost/nhost/releases/tag/storage%400.12.0"}],"affected":[{"vendor":"nhost","product":"nhost","versions":[{"version":"< 0.12.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-20T23:00:18.342Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-g9f6-9775-hffm","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-25T13:44:34.920197Z","id":"CVE-2026-33221","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-25T13:44:43.741Z"}}]}}