CVE-2026-105863: Payload authentication token field handling issue

October 7, 2026

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.

References

github.com/advisories/GHSA-66wr-7vmr-p5jq
github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c
github.com/payloadcms/payload/releases/tag/v3.90.0
github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq
nvd.nist.gov/vuln/detail/CVE-2026-105863

Code Behaviors & Features

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