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    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.

    Published:Sep 25, 2026
    Last Modified:Oct 1, 2026
    EPS:Sep 25, 2026
    EPSS Score:0.00177
    CVSS Score:4.3

    Affected Products

    Vendor
    Payloadcms
    Product
    Payload

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

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    CVE-2026-105866 (CVSS 6.9) — Payload is a free and open source headless content management system. In versions before 3.90.0 and canary ver…
    CVE-2026-105865 (CVSS 8.1) — Payload is a free and open source headless content management system. In versions before 3.90.0 and canary ver…
    CVE-2026-105864 (CVSS 5.3) — Payload is a free and open source headless content management system. In @payloadcms/plugin-multi-tenant versi…
    CVE-2026-105863 (CVSS 9.2) — Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.…
    CVE-2026-105862 (CVSS 8.7) — Payload is a free and open source headless content management system. In versions before 3.90.0 and canary ver…
    CVE-2026-105861 (CVSS 7.2) — Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High