Payload: Client uploads could overwrite S3 objects
Impact
An authenticated user could overwrite an existing S3 object belonging to another upload collection, bypassing that collection’s access controls and prior file validation.
You are affected if ALL of these are true:
- Client uploads are enabled for multiple collections that share an S3 bucket.
- useCompositePrefixes is not configured or is set to
false.
Patches
Users should upgrade Payload packages to >= 3.90.0 or >= 4.0.0-canary.34.
Workarounds
Disable client uploads until you can upgrade.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @payloadcms/storage-s3 | < 3.90.0, >= 4.0.0-canary.0, < 4.0.0-canary.34 | 3.90.0, 4.0.0-canary.34 |
References
- https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8
- https://nvd.nist.gov/vuln/detail/CVE-2026-105867
- https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2
- https://github.com/payloadcms/payload
- https://github.com/payloadcms/payload/releases/tag/v3.90.0
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-639- Platform
- npm
- Package
@payloadcms/storage-s3- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7vg8-29qx-jgj8 - CC BY 4.0
Vulnerability history: @payloadcms/storage-s3
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 04.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
-
Payload: Client uploads could overwrite S3 objects this entry
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