---
id: CVE-2026-105863
title: Payload is a free and open source headless content management system
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 authentic…
severity: critical
cvss: 9.2
cvssVector: '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'
cwe:
  - CWE-290
  - CWE-915
vendor: payloadcms
product: payload
affected:
  - 'payload >= 3.0.0, < 3.90.0'
  - 'payload >= 4.0.0-canary.0, < 4.0.0-canary.34'
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T17:17:22.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105863'
references:
  - url: >-
      https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c
    label: security-advisories@github.com
  - url: 'https://github.com/payloadcms/payload/releases/tag/v3.90.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-06T17:09:22.194Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.