Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
9.3

Payload CMS duplicate operation reveals hidden data

CVE-2026-105851 · published 3 days ago
Summary

The free Payload content system (versions 3.0.0 up to 3.90.0 and early 4.0.0‑canary builds) can copy information from a hidden field even when users shouldn’t see it. This means a user could obtain data they are not allowed to read. Update to version 3.90.0 or later 4.0.0‑canary.34 to stop the problem.

What to do
  • Update elliotpayload payload to version 3.90.0.
  • Update elliotpayload payload to version 4.0.0-canary.34.
  • Update payload to version 3.90.0.
  • Update payload to version 4.0.0-canary.34.
Affected software
Ecosystem VendorProductAffected versions
– payloadcms payload > 3.0.0, < 3.90.0
npm elliotpayload payload > 3.0.0, < 3.90.0
> 4.0.0-canary.0, < 4.0.0-canary.34
Fix: upgrade to 3.90.0
npm – payload > 3.0.0, < 3.90.0
> 4.0.0-canary.0, < 4.0.0-canary.34
Fix: upgrade to 3.90.0
Original advisory text
Payload: Field access control bypass on auth collections
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, the duplicate operation copies values from a source document even when a field is hidden or its access.read or access.create rule rejects that value for the caller. The disableDuplicate setting does not prevent this access-control bypass. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
References
Severity
9.3 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-284Improper Access Control
CWE-863Incorrect Authorization
Timeline
Published6 Oct 2026
Updated9 Oct 2026
First seen6 Oct 2026
Sources
CVE-2026-105851 · NVD
CVE-2026-105851 · MITRE
GHSA-vc4h-q48j-5hcx · GHSA
CVE-2026-105851 · OSV
Track software like this
Free during beta