What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-15
• Weakness: CWE-290

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.

Affected products

• payloadcms payload: from 3.0.0 before 3.90.0; 4.0.0-canary0, 4.0.0-canary1, 4.0.0-canary10, 4.0.0-canary11, 4.0.0-canary12, 4.0.0-canary13 (+28) — fixed in 3.90.0

How to fix

Upgrade to a fixed version: payloadcms payload 3.90.0. Check the vendor advisory for mitigations.

References

• https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c
• https://github.com/payloadcms/payload/releases/tag/v3.90.0
• https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq

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