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OpenAdvisories
High · 7.1 CVE-2026-105867 EUVD-2026-93513GHSA-7vg8-29qx-jgj8

Payload: Client uploads could overwrite S3 objects

Published Oct 6, 2026 · Updated Oct 6, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
payloadcms payload < 3.90.0, >= 4.0.0-canary.0, < 4.0.0-canary.34 —
@payloadcms storage-s3 < 3.90.0, >= 4.0.0-canary.0, < 4.0.0-canary.34 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @payloadcms/storage-s3 < 3.90.0 3.90.0 GHSA-7vg8-29qx-jgj8
npm @payloadcms/storage-s3 >= 4.0.0-canary.0, < 4.0.0-canary.34 4.0.0-canary.34 GHSA-7vg8-29qx-jgj8

References