JavaScript Execution Vulnerability in Payload CMS Affecting Specific Versions
CVE-2026-105868

8.6HIGH

Key Information:

Vendor

Payloadcms

Status
Payload
Vendor
CVE Published:
6 October 2026

What is CVE-2026-105868?

A vulnerability exists in Payload, a headless content management system, where local upload configurations that permit XML files can lead to the execution of unauthorized JavaScript. This exposure occurs when a valid user opens an insecure XML file stored within the system. To mitigate this issue, it is strongly recommended to upgrade to versions 3.90.0 or 4.0.0-canary.34 or later, which address this critical coding flaw.

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/a8c3a8e8e268...
x_refsource_MISC
https://github.com/payloadcms/payload/releases/tag/v3.90.0
x_refsource_MISC

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.