What is CVE-2026-93363?

CVE-2026-93363 is a medium-severity vulnerability in Payloadcms Payload, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-25.

How severe is CVE-2026-93363?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Payloadcms Payload

CVE-2026-93363

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.

Vulnerability class: Broken Access Control

Published 2026-09-25 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Payloadcms Payload

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

github.com/payloadcms/payload/security/advisories/GHSA-mc8m-rr6c-r5qr (vendor-advisory)
www.vulncheck.com/advisories/payload-cms-storage-vercel-blob-adapter-improper-a… (third-party-advisory)

Frequently asked questions

What is CVE-2026-93363?: CVE-2026-93363 is a medium-severity vulnerability in Payloadcms Payload, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-25.
How severe is CVE-2026-93363?: Medium severity. CVSS v3 base score is 4.3 out of 10.