CVE-2026-105868: Payloadcms Payload

High severity, CVSS 8.6. EPSS: 0.3% chance of exploitation in the next 30 days.

Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, local upload configurations that accept XML files can store an XML file and stylesheet that execute JavaScript in the Payload origin when a logged-in user opens the file. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Affected products

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

Published 2026-10-06. Last modified 2026-10-09.