{"id":"CVE-2026-93363","summary":"Payload CMS storage-vercel-blob Adapter Improper Access Control on Upload Route","details":"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.","aliases":["GHSA-mc8m-rr6c-r5qr"],"modified":"2026-09-27T03:47:38.590990731Z","published":"2026-09-25T16:53:12.583Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"4.0.0-canary.0"},{"fixed":"4.0.0-canary.34"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93363.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93363.json"},{"type":"ADVISORY","url":"https://github.com/payloadcms/payload/security/advisories/GHSA-mc8m-rr6c-r5qr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93363"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/payload-cms-storage-vercel-blob-adapter-improper-access-control-on-upload-route"},{"type":"PACKAGE","url":"https://github.com/payloadcms/payload"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/payloadcms/payload","events":[{"introduced":"bdf0113b2f52f9c7fc06118d4bf2025cec5ca527"},{"fixed":"e10b60228b92b680663110ea2af431643bfc6126"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"3.25.0"},{"fixed":"3.90.0"}]}}],"versions":["v3.89.0","v3.87.1","v3.88.0","v3.87.0","v3.86.0","v3.85.2","v3.85.1","v3.85.0","v3.84.1","v3.84.0","v3.83.0","v3.82.1","v3.82.0","v3.81.0","v3.80.0","v3.79.1","v3.79.0","v3.78.0","v3.77.0","v3.76.1","v3.76.0","v3.75.0","v3.74.0","v3.73.0","v3.72.0","v3.71.1","v3.71.0","v3.70.0","v3.69.0","v3.68.5","v3.68.4","v3.68.3","v3.68.2","v3.68.1","v3.68.0","v3.67.0","v3.66.0","v3.65.0","v3.64.0","v3.63.0","v3.62.0","v3.61.1","v3.61.0","v3.60.0","v3.59.1","v3.59.0","v3.58.0","v3.57.0","v3.56.0","v3.55.1","v3.55.0","v3.54.0","v3.50.0","v3.53.0","v3.52.0","v3.51.0","v3.49.1","v3.49.0","v3.48.0","v3.47.0","v3.46.0","v3.45.0","v3.44.0","v3.43.0","v3.42.0","v3.41.0","v3.40.0","v3.39.1","v3.39.0","v3.38.0","v3.37.0","v3.36.1","v3.36.0","v3.35.1","v3.35.0","v3.34.0","v3.33.0","v3.32.0","v3.31.0","v3.30.0","v3.29.0","v3.28.1","eslint/3.28.0","v3.28.0","v3.27.0","v3.26.0","v3.25.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93363.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}