Vercel’s AI SDK's filetype whitelists can be bypassed when uploading files
Date: 2025-11
Affected: npm/ai, npm/ai
Attack vector: other
Category: vulnerability-disclosure
Severity: Low
CVE: CVE-2025-48985
CWE: CWE-20
CWE-682
CVSS: 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

A vulnerability in Vercel’s AI SDK has been fixed in versions 5.0.52, 5.1.0-beta.9, and 6.0.0-beta. This issue may have allowed users to bypass filetype whitelists when uploading files. All users are encouraged to upgrade.


Mitigations:

Architectural layers (MAESTRO):