CVE-2026-105863 PUBLISHED

Payload authentication token field handling issue

Assigner: GitHub_M
Reserved: 05.10.2026 Published: 06.10.2026 Updated: 06.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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 Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	payloadcms
Product	payload
Versions	Version >= 3.0.0, < 3.90.0 is affected Version >= 4.0.0-canary.0, < 4.0.0-canary.34 is affected

References

Problem Types

CWE-290: Authentication Bypass by Spoofing CWE
CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes CWE