fkie_cve-2026-105863

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.

GHSA-66wr-7vmr-p5jq — Payload authentication token field handling issue

Affected: npm: payload

### Impact

Under certain field configurations, Payload could include unintended values in the authentication token issued at login.

You are affected if:

- You use an affected Payload version and have configured a custom field option that maps a field to a reserved authentication claim name.

### Patches Payload now restricts which field configuration options can influence the contents of the authentication token.

Users should upgrade payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`.

### Workarounds There is no complete workaround. Users should upgrade payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`.

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fkie_cve-2026-105863

GHSA-66wr-7vmr-p5jq — Payload authentication token field handling issue