https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-08T11:25:45.806347+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/fkie_cve-2026-105867 fkie_cve-2026-105867 2026-10-08T11:25:45.808166+00:00

Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

 https://vulnerability.circl.lu/vuln/ghsa-7vg8-29qx-jgj8 GHSA-7vg8-29qx-jgj8 — Payload: Client uploads could overwrite S3 objects 2026-10-08T11:25:45.808278+00:00

Affected: npm: @payloadcms/storage-s3

### 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.