CVE-2026-27567 Payload has Server-Side Request Forgery (SSRF) in External File URL Uploads
An authenticated attacker with upload permissions can exploit insufficient redirect validation to access internal network resources and retrieve sensitive data.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27567?
CVE-2026-27567 is a medium-severity server-side request forgery vulnerability in payloadcms payload, published on 24 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Payload is a free and open source headless content management system. Prior to 3.75.0, a Server-Side Request Forgery (SSRF) vulnerability exists in Payload's external file upload functionality. When processing external URLs for file uploads, insufficient validation of HTTP redirects could allow an authenticated attacker to access internal network resources. The Payload environment must have at least one collection with `upload` enabled and a user who has `create` access to that upload-enabled collection in order to be vulnerable. An authenticated user with upload collection write permissions could potentially access internal services. Response content from internal services could be retrieved through the application. This vulnerability has been patched in v3.75.0. As a workaround, one may mitigate this vulnerability by disabling external file uploads via the `disableExternalFile` upload collection option, or by restricting `create` access on upload-enabled collections to trusted users only.
Weakness: CWE-918
Which versions are affected by CVE-2026-27567?
2 open source packages ship an affected version, including payload. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
payload npm | All versions | 3.75.0 |
payload npm | All versions | 3.75.0 |
Products include Payloadcms Payload.
How do I fix CVE-2026-27567?
Upgrade payload to 3.75.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-27567 being exploited?
There is no known exploitation of CVE-2026-27567 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-hhfx-5x8j-f5f6.