CVE-2026-27567: Payload Server-Side Request Forgery (SSRF) Vulnerability

MODERATE
Advisory Identifier: GHSA-hhfx-5x8j-f5f6
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CVSS 6.5
CWE-918
Published
Advisory Summary

CVE-2026-27567 is a MODERATE (CVSS 6.5) server-side request forgery (ssrf) vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Payload libraries in the npm ecosystem. The issue involves server-side request forgery (ssrf) in external file url uploads. Remediation is available by upgrading affected packages to version 3.75.0.

CVE-2026-27567 at a Glance

CVE Identifier CVE-2026-27567
GHSA Identifier GHSA-hhfx-5x8j-f5f6
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Payload
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-27567

To remediate this vulnerability, upgrade all affected Payload dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

payload fixed: 3.75.0 
npm install payload@3.75.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls payload

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-27567, inspect your project dependencies using npm:

npm ls payload

Analyze the terminal output to locate any version of Payload in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.75.0), your application is affected.

Note: The npm ls payload command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Payload, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact 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. **Users are affected if ALL of these are true**: - Payload version < v3.75.0 - At least one collection with `upload` enabled - A user has `create` access to that upload-enabled collection An authenticated user with upload collection write permissions could potentially access internal services. Response content from internal services could be retrieved through the application. ### Patches This vulnerability has been patched in v3.75.0. Users should upgrade to v3.75.0 or later. ### Workarounds If users cannot upgrade immediately, they can 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**.

CVE-2026-27567 Affected Payload Versions

1 component(s)
Fixed Versions:
3.75.0
Product / Package Ecosystem Affected Versions Fixed Version
payload
npm/payload
npm
< 3.75.0
3.75.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/payloadcms/payload/security/advisories/GHSA-hhfx-5x8j-f5f6
NVD — CVE-2026-27567 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27567
Security Fix Commit FIX COMMIT
https://github.com/payloadcms/payload/commit/1041bb6
Payload Source Repository REPOSITORY
https://github.com/payloadcms/payload
Payload Release RELEASE
https://github.com/payloadcms/payload/releases/tag/v3.75.0

Frequently Asked Questions

What is CVE-2026-27567?
CVE-2026-27567 is a security vulnerability in Payload involving Server-Side Request Forgery (SSRF) in External File URL Uploads under CWE-918: Server-Side Request Forgery (SSRF).
Which Payload versions are affected?
Affected versions include releases prior to 3.75.0 across affected packages: payload.
What version fixes CVE-2026-27567?
Upgrading to 3.75.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is payload affected?
Yes, payload is affected in releases prior to 3.75.0. Upgrade your dependency to 3.75.0 or later.
What is the CVSS score of CVE-2026-27567?
CVE-2026-27567 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-27567?
CVE-2026-27567 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check npm dependencies for CVE-2026-27567?
Run the dependency tree command: 'npm ls payload'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hhfx-5x8j-f5f6",
  "modified" : "2026-02-24T20:10:32Z",
  "published" : "2026-02-24T20:10:32Z",
  "aliases" : [ "CVE-2026-27567" ],
  "summary" : "Payload: Server-Side Request Forgery (SSRF) in External File URL Uploads",
  "details" : "### Impact\n\nA 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.\n\n**Users are affected if ALL of these are true**:\n\n- Payload version < v3.75.0\n- At least one collection with `upload` enabled\n- A user has `create` access to that upload-enabled collection\n\nAn authenticated user with upload collection write permissions could potentially access internal services. Response content from internal services could be retrieved through the application.\n\n### Patches\n\nThis vulnerability has been patched in v3.75.0. Users should upgrade to v3.75.0 or later.\n\n### Workarounds\n\nIf users cannot upgrade immediately, they can 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**.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "payload"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.75.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/security/advisories/GHSA-hhfx-5x8j-f5f6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27567"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/commit/1041bb6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/payloadcms/payload"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/releases/tag/v3.75.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-24T20:10:32Z",
    "nvd_published_at" : "2026-02-24T15:21:38Z"
  }
}