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Vulnerabilities

Security fix · CVE-2026-93363

@payloadcms/storage-vercel-blob has access control bypass of uploads in Vercel Storage adapter

Published Nov 4, 2026 · catalog updated Nov 4, 2026 · @payloadcms/storage-vercel-blob has access control

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-93363. EPSS is 0.18%. Act only if a listed version of @payloadcms/storage-vercel-blob has access control is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (@payloadcms/storage-vercel-blob has access control).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Version ranges on file
Affected products
npm @payloadcms · npm @payloadcms/storage-vercel-blob

### Impact In affected configurations, client upload access does not consistently align with the associated collection’s access configuration. You are affected if: - You use client uploads with . - Authenticated users can access the client-upload route. Applications that do not enable client uploads are not affected. ### Patches Client uploads now require authentication and the appropriate collection-level access before upload access is granted. Users should upgrade Payload packages to or . ### Workarounds Upgrading to a patched version is recommended. Until you can upgrade, disable client uploads or configure the upload route’s access control to enforce the associated collection’s permissions.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm @payloadcmsversion unspecified
  • npm @payloadcms/storage-vercel-blob>= 3.25.0, < 3.90.0
  • npm @payloadcms/storage-vercel-blob>= 4.0.0-canary.0, < 4.0.0-canary.34

How to fix CVE-2026-93363

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-93363. EPSS is 0.18%. Act only if a listed version of @payloadcms/storage-vercel-blob has access control is installed.

Which versions are affected?

Compare what you have installed with >= 3.25.0, < 3.90.0, >= 4.0.0-canary.0, < 4.0.0-canary.34. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2026 · GitHub Advisory Database

    Detected

    ### Impact In affected configurations, client upload access does not consistently align with the associated collection’s access configuration. You are affected if: - You use client uploads with . - Authenticated users can access the client-upload route. Applications that do not enable client uploads are not affected. ### Patches Client uploads now require authentication and the appropriate collect

  2. Nov 4, 2026 · GitHub Advisory Database

    Updated

    ### Impact In affected configurations, client upload access does not consistently align with the associated collection’s access configuration. You are affected if: - You use client uploads with . - Authenticated users can access the client-upload route. Applications that do not enable client uploads are not affected. ### Patches Client uploads now require authentication and the appropriate collect

Sources

  • CVE.orgVulnerability recordCVE-2026-93363

    Official CVE identifier

    cve.org
  • GitHub Advisory DatabasePackage advisoryGHSA-mc8m-rr6c-r5qr

    @payloadcms/storage-vercel-blob has access control bypass of uploads in Vercel Storage adapter

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-93363

    In affected configurations, client upload access does not consistently align with the associated collection’s access configuration. You are affected if: You use client uploads with @payloadcms/storage-vercel-blob. Authenticated users can access the client-upload route. Applications that do not enable client uploads are not affected.

    advisories.gitlab.com

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • GitLab Advisory DatabaseNov 5, 2026
  • CVE.orgNov 4, 2026
  • GitHub Advisory DatabaseNov 4, 2026