CVE-2026-105863
Critical
9.4 CVSS v3.1
CVSS v4.0: 9.2
- Published
- Oct 6, 2026
- Updated
- Oct 15, 2026
- Vendor
- Payloadcms
- Affected versions
- See affected products
- Weakness
- CWE-290, CWE-915
Summary
Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.0, a custom field option that maps a field to a reserved authentication claim name can place unintended values in the authentication token issued at login. This issue is fixed in version 3.90.0.
Severity
Critical (9.4)CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0 (9.2)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected products
- Payloadcms Payload >= 3.0.0, < 3.90.0
- Payloadcms Payload 4.0.0
Exploitation status
Unknown
Technical details
Technical analysis has not been written for this record yet.
Mitigation & remediation
Follow the vendor advisory linked below for patches and workarounds.