Remote Code Execution Vulnerability in Payload CMS Affects Versions Before 3.90.0
CVE-2026-105858

8.1HIGH

Key Information:

Vendor

Payloadcms

Status
Payload
Vendor
CVE Published:
6 October 2026

What is CVE-2026-105858?

A vulnerability in Payload CMS allows for the execution of arbitrary code through crafted requests to the public first-register operation when local authentication is enabled and no initial user is created. This flaw affects Payload CMS versions prior to 3.90.0 and canary editions before 4.0.0-canary.34, potentially putting systems at risk if not updated to the patched versions.

Affected Version(s)

payload < 3.90.0 < 3.90.0

payload >= 4.0.0-canary.0, < 4.0.0-canary.34 < 4.0.0-canary.0, 4.0.0-canary.34

References

https://github.com/payloadcms/payload/security/advisories...
x_refsource_CONFIRM
https://github.com/payloadcms/payload/commit/e947fc4ba4a4...
x_refsource_MISC
https://github.com/payloadcms/payload/releases/tag/v3.90.0
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.