CVE-2026-105863

Payload authentication token field handling issue

State: Published
Severity: 9.2 Critical
Published: Oct 6, 2026
Updated: Oct 9, 2026
Reserved: Oct 5, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	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	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
payloadpayloadcms	>= 3.0.0, < 3.90.0Affected >= 4.0.0-canary.0, < 4.0.0-canary.34Affected

References

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