CVE-2026-8768: vercel ai provider-utils download-blob.ts validateDownloadUrl server-side request forgery
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
provider-utilsfrom your environment.Remove or stop using the provider-utils package (and specifically the download-blob functionality) until an official fix is available. Uninstall the package or remove the code that calls validateDownloadUrl if it is not required.
- Compensating control
Block or restrict outbound URL fetches from services using provider-utils to prevent SSRF. Implement egress controls such as firewall rules, network ACLs, proxy allowlists, or a WAF to limit reachable hosts and deny access to internal IP ranges and metadata endpoints.
- Operational
Because a public exploit exists, assume possible exploitation: review application and network logs for suspicious download requests originating from the affected code (download-blob/validateDownloadUrl), and rotate any credentials or secrets that may have been exposed if suspicious activity is found.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8768?
The severity of CVE-2026-8768 is classified as high due to its potential for server-side request forgery.
How do I fix CVE-2026-8768?
To fix CVE-2026-8768, upgrade to a version of vercel ai greater than 3.0.97.
What software is affected by CVE-2026-8768?
CVE-2026-8768 affects the vercel ai package, specifically versions up to 3.0.97.
What is the impact of CVE-2026-8768?
The impact of CVE-2026-8768 includes potential unauthorized access to internal services through manipulated requests.
Is CVE-2026-8768 exploitable remotely?
Yes, CVE-2026-8768 is exploitable remotely, allowing attackers to launch server-side request forgery attacks.