CVE-2026-105861 Payload external upload trust validation issue
Authenticated users can expose session data to unintended recipients via unverified external URL uploads in Payload CMS.
- 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-2026-105861?
CVE-2026-105861 is a high-severity server-side request forgery 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 after 3.0.0 and before 3.90.0, authenticated external URL-based upload retrieval can forward authentication data to a redirected destination that was not verified as trusted, potentially exposing a valid session to an unintended recipient. This issue is fixed in version 3.90.0.
Which versions are affected by CVE-2026-105861?
4 open source packages ship an affected version, including payload. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
payload npm | From 3.0.0 | 3.90.0 |
payload npm | From 3.0.0 | 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-2026-105861?
Upgrade payload to a fixed version for your release line: 3.90.0 or 4.0.0-canary.34.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-105861 being exploited?
There is no known exploitation of CVE-2026-105861 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-pj5h-5q6c-3pfx.