CVE-2026-32630: Sindresorhus File-Type

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

file-type detects the file type of a file, stream, or data. From 20.0.0 to 21.3.1, a crafted ZIP file can trigger excessive memory growth during type detection in file-type when using fileTypeFromBuffer(), fileTypeFromBlob(), or fileTypeFromFile(). The ZIP inflate output limit is enforced for stream-based detection, but not for known-size inputs. As a result, a small compressed ZIP can cause file-type to inflate and process a much larger payload while probing ZIP-based formats such as OOXML. This vulnerability is fixed in 21.3.2.

Affected products

• Sindresorhus File-Type: from 20.0.0, before 21.3.2 (fixed in 21.3.2)

Published 2026-03-16. Last modified 2026-06-17.