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CVE-2026-105847: Payload: Polymorphic join queries could disclose hidden fields

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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-200

Description

Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary versions before 4.0.0-canary.34, a user who can query a collection with a polymorphic join to sensitive fields can infer hidden or read-restricted values, including password-reset tokens, through polymorphic join filters. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

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/caa3f69b5aecc6e7c2b459ed87972cbca9f33ee5
• https://github.com/payloadcms/payload/releases/tag/v3.90.0
• https://github.com/payloadcms/payload/security/advisories/GHSA-fpww-c55p-cjv6

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