{"id":"CVE-2026-93363","title":"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","summary":"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. Attac…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-862"],"vendor":"payloadcms","product":"payload","affected":["payload >= 3.25.0 < 3.90.0","payload >= 4.0.0-canary.0 < 4.0.0-canary.34"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T18:17:33.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93363","references":[{"url":"https://github.com/payloadcms/payload/security/advisories/GHSA-mc8m-rr6c-r5qr","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/payload-cms-storage-vercel-blob-adapter-improper-access-control-on-upload-route","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-25T17:06:56.287708Z"},"ingestedAt":"2026-09-25T17:13:14.014Z","slug":"CVE-2026-93363","body":"## Overview\n\nThe @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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}