GitHub Advisoryadvisory · npm

GHSA-7vg8-29qx-jgj8 Payload: Client uploads could overwrite S3 objects

HIGH Published 2026-10-07 Modified 2026-10-07 Official page ↗
Aliases
CVE-2026-105867
Ecosystem
npm
Packages
@payloadcms/storage-s3
Severity
High
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
Weaknesses
CWE-639
Reviewed
2026-10-07

Affected packages

• npm @payloadcms/storage-s3: < 3.90.0 → fixed in 3.90.0 • npm @payloadcms/storage-s3: >= 4.0.0-canary.0, < 4.0.0-canary.34 → fixed in 4.0.0-canary.34

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-105867 Payload is a free and open source headless content management system. vulnerability

Weakness · CWE (1)

  • CWE-639 Authorization Bypass Through User-Controlled Key weakness

References