Nhost Storage Affected by MIME Type Spoofing via Trusted Client Content-Type Header in Storage Upload

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0018, the 8th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:08 UTC First seen by agentprime
2. 31 Oct 2026, 15:08 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-g9f6-9775-hffm
• OSV: GHSA-g9f6-9775-hffm
• github.com/nhost/nhost/security/advisories/GHSA-g9f6-9775-hffm
• nvd.nist.gov/vuln/detail/CVE-2026-33221
• github.com/nhost/nhost/pull/4018
• github.com/nhost/nhost/commit/c4bd53f042d7f568e567e18e2665af81660fce85
• github.com/nhost/nhost
• github.com/nhost/nhost/releases/tag/storage%400.12.0
• github.com/nhost/nhost/releases/tag/[email protected]

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.