CVE-2025-48985: ai Input Validation Flaw — Fix

Description

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. More details: https://vercel.com/changelog/cve-2025-48985-input-validation-bypass-on-ai-sdk

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CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
vercel	ai	< 5.0.52
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All
vercel	ai	All

References

Advisories & Patches

https://github.com/vercel/ai/commit/930399bb9839a8baf3d349614106d78268775eed https://vercel.com/changelog/cve-2025-48985-input-validation-bypass-on-ai-sdk

Frequently Asked Questions

What is CVE-2025-48985? +

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. More details: https://vercel.com/changelog/cve-2025-48985-input-validation-bypass-on-ai-sdk It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2025-48985? +

CVE-2025-48985 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-48985? +

CVE-2025-48985 affects products from vercel, specifically: ai. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-48985? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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