CVE-2026-105863
Critical
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.
SeverityCritical
CVSS9.4
Exploit probability—
ProductPayload
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-290CWE-290CWE-915CWE-915
How to fix
Update
- payloadcms payload3.90.0 or later
- payload3.90.0, 4.0.0-canary.34 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| payloadcms payload | 3.0.0 ≤ v < 3.90.0, 4.0.0 | 3.90.0 |
| payloadnpm | 3.0.0 ≤ v < 3.90.0, 4.0.0-canary.0 ≤ v < 4.0.0-canary.34 | 3.90.0, 4.0.0-canary.34 |
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