CVE-2026-27567

The record

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.

Affected packages

Related vulnerabilities

• GHSA-hhfx-5x8j-f5f6 Payload: Server-Side Request Forgery (SSRF) in External File URL Uploads Same vulnerability
• GHSA-p6mr-xf3r-ghq4 Payload has a CSRF Protection Bypass in Authentication Flow Also affects payload
• GHSA-6r7f-q7f5-wpx8 Payload has Authenticated SSRF via Upload Functionality Also affects payload
• GHSA-7xxh-373w-35vg Payload has an SQL Injection via Query Handling Also affects payload
• CVE-2026-34749 Payload is a free and open source headless content management system. Also affects payload
• CVE-2026-34746 Payload is a free and open source headless content management system. Also affects payload
• CVE-2026-34747 Payload is a free and open source headless content management system. Also affects payload
• CVE-2026-34751 Payload is a free and open source headless content management system. Also affects payload