CVE-2026-105867
Published:October 06, 2026
Updated:October 10, 2026
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 Packages
https://github.com/payloadcms/payload.git (GITHUB):
Affected version(s) >=v3.25.0 <v3.90.0Fix Suggestion:
Update to version v3.90.0@payloadcms/storage-s3 (NPM):
Affected version(s) >=4.0.0-canary.0 <4.0.0-canary.34Fix Suggestion:
Update to version 4.0.0-canary.34@payloadcms/storage-s3 (NPM):
Affected version(s) >=3.25.0 <3.90.0Fix Suggestion:
Update to version 3.90.0@payloadcms/storage-s3 (NPM):
Affected version(s) >=3.0.0-alpha.62 <3.90.0Fix Suggestion:
Update to version 3.90.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
EPSS
Base Score:
0.25