Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M
CVE-2026-105868Payload: Uploaded XML files could execute same-origin JavaScript
High 8.6
In plain English
A high-severity unrestricted file upload in payload from payloadcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, local upload configurations that accept XML files can store an XML file and stylesheet that execute JavaScript in the Payload origin when a logged-in user opens the file. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | payload | 3.90.0 | GHSA-9qpg-3cf8-w33x |
| npm | payload | 4.0.0-canary.34 | GHSA-9qpg-3cf8-w33x |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| payloadcms | payload | < 3.90.0>= 4.0.0-canary.0, < 4.0.0-canary.34 |
Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N