CVE-2026-8768: vercel ai provider-utils download-blob.ts validateDownloadUrl server-side request forgery

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-17 · updated 2026-10-14
Weakness: CWE-918

Description

A vulnerability was found in vercel ai up to 3.0.97. The affected element is the function validateDownloadUrl of the file packages/provider-utils/src/download-blob.ts of the component provider-utils. The manipulation results in server-side request forgery. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

vercel ai: through 3.0.97

References

https://gist.github.com/YLChen-007/07d149bd68adbee58165b4207a2abc71
https://gist.github.com/YLChen-007/cf7e47e4dda392f474ca77a66d1d847f
https://vuldb.com/submit/811404
https://vuldb.com/submit/811405
https://vuldb.com/vuln/364393
https://vuldb.com/vuln/364393/cti

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