CVE-2026-105851: Payloadcms Payload

Critical severity, CVSS 9.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary versions before 4.0.0-canary.34, the duplicate operation copies values from a source document even when a field is hidden or its access.read or access.create rule rejects that value for the caller. The disableDuplicate setting does not prevent this access-control bypass. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Affected products

• Payloadcms Payload: after 3.0.0, before 3.90.0 (fixed in 3.90.0); after 4.0.0-canary.0, before 4.0.0-canary.34 (fixed in 4.0.0-canary.34)

Published 2026-10-06. Last modified 2026-10-06.