Medium severity4.3NVD Advisory· Published Sep 25, 2026· Updated Sep 25, 2026

CVE-2026-93363

Description

The @payloadcms/storage-vercel-blob storage adapter for Payload contains an improper access control vulnerability that allows authenticated users to bypass collection-level permissions by accessing the client-upload route directly. Attackers can upload files through the client-upload endpoint without possessing the required collection access permissions, circumventing the intended access control enforcement.

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Affected products

Payloadcms/Payloadllm-fuzzy

Patches

Vulnerability mechanics

References

github.com/payloadcms/payload/security/advisories/GHSA-mc8m-rr6c-r5qrnvd
www.vulncheck.com/advisories/payload-cms-storage-vercel-blob-adapter-improper-access-control-on-upload-routenvd

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