Payload CMS storage-vercel-blob Adapter Improper Access Control on Upload Route
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.
CVE-2026-93363
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93363
payload
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/payloadcms/payload",
"vendor": "payloadcms",
"product": "payload",
"versions": [
{
"status": "affected",
"version": "3.25.0",
"lessThan": "3.90.0",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.0.0-canary.0",
"lessThan": "4.0.0-canary.34",
"versionType": "custom"
}
],
"packageURL": "pkg:github/payloadcms/payload",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-93363
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #5601 · Revision 1
- Added to Heist Feed
- Publisher date