CVE-2026-105863
Payload authentication token field handling issue
CRITICAL 9.2EPSS 0.4%
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.
- Affected
- payloadcms · payload
- CVSS v4.0 GITHUB
- 9.2 CRITICAL
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 - CVSS v4.0 GitHub
- 9.2 CRITICAL
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 - CVSS v3.1 NVD
- 9.4 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L - EPSS
- 0.38% chance of exploitation in the next 30 days, 30th percentile
- Published
- 2026-10-06
- Updated
- 2026-10-09
Proof-of-concept exploits (2)
- payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq
- payloadcms/payload/releases/tag/v3.90.045286★ · 2026-10-16