CVE-2026-105868 Payload: Uploaded XML files could execute same-origin JavaScript
Attackers can upload XML files with stylesheets to execute JavaScript in the Payload CMS origin, potentially compromising user accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-105868?
CVE-2026-105868 is a high-severity cross-site scripting vulnerability in payloadcms payload, published on 6 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-105868?
4 open source packages ship an affected version, including payload. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
payload npm | All versions | 3.90.0 |
payload npm | All versions | 3.90.0 |
payload npm | From 4.0.0-canary.0 | 4.0.0-canary.34 |
payload npm | From 4.0.0-canary.0 | 4.0.0-canary.34 |
Products include Payloadcms Payload.
How do I fix CVE-2026-105868?
Upgrade payload to a fixed version for your release line: 3.90.0 or 4.0.0-canary.34.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-105868 being exploited?
There is no known exploitation of CVE-2026-105868 in the wild and no public exploit code.
Other vulnerabilities in payloadcms payload
- CVE-2026-105857 Payload: RCE in Payload Form Builder
- CVE-2026-105859 Payload: Unauthorized update to collection documents
- CVE-2026-25544 Payload has an SQL Injection in JSON/RichText Queries on PostgreSQL/SQLite Adapters
- CVE-2022-27952 Unrestricted Upload of File with Dangerous Type in Payload
- CVE-2026-105851 Payload: Field access control bypass on auth collections
Sources
Also known as GHSA-9qpg-3cf8-w33x.