CVE-2026-105868: Payload Uploaded XML Files Could Execute Vulnerability

HIGH
Advisory Identifier: GHSA-9qpg-3cf8-w33x
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CWE-434
Published
Advisory Summary

CVE-2026-105868 is a HIGH uploaded xml files could execute vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Payload libraries in the npm ecosystem. The issue involves uploaded xml files could execute same-origin javascript. Remediation is available by upgrading affected packages to version 3.90.0, 4.0.0-canary.34.

CVE-2026-105868 at a Glance

CVE Identifier CVE-2026-105868
GHSA Identifier GHSA-9qpg-3cf8-w33x
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Payload
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-105868

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: 3.90.0 
npm install payload@3.90.0
payload fixed: 4.0.0-canary.34 
npm install payload@4.0.0-canary.34
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-2026-105868, 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 3.90.0), 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. 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 Under certain local upload configurations, an uploaded XML file and stylesheet could execute JavaScript in the Payload origin when a logged-in user opens the file. You are affected if: - You accept XML uploads (accepted by default). ### Patches Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ### Workarounds Disallow XML/XSL uploads.

CVE-2026-105868 Affected Payload Versions

2 component(s)
Fixed Versions:
3.90.04.0.0-canary.34
Product / Package Ecosystem Affected Versions Fixed Version
payload
npm/payload
npm
< 3.90.0
3.90.0
payload
npm/payload
npm
≥ 4.0.0-canary.0
< 4.0.0-canary.34
4.0.0-canary.34

References

GitHub Advisory / Wiki ADVISORY
https://github.com/payloadcms/payload/security/advisories/GHSA-9qpg-3cf8-w33x
NVD — CVE-2026-105868 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105868
Security Fix Commit FIX COMMIT
https://github.com/payloadcms/payload/commit/a8c3a8e8e2680c96ec4f66f5b3854c5df6c35adf
Payload Source Repository REPOSITORY
https://github.com/payloadcms/payload
Payload Release RELEASE
https://github.com/payloadcms/payload/releases/tag/v3.90.0

Frequently Asked Questions

What is CVE-2026-105868?
CVE-2026-105868 is a security vulnerability in Payload involving Uploaded XML files could execute same-origin JavaScript under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Payload versions are affected?
Affected versions include releases prior to 3.90.0, 4.0.0-canary.34 across affected packages: payload.
What version fixes CVE-2026-105868?
Upgrading to 3.90.0, 4.0.0-canary.34 (or the latest patched release for your respective branch) resolves the vulnerability.
Is payload affected?
Yes, payload is affected in releases prior to 3.90.0, 4.0.0-canary.34. Upgrade your dependency to 3.90.0, 4.0.0-canary.34 or later.
What CWE is associated with CVE-2026-105868?
CVE-2026-105868 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check npm dependencies for CVE-2026-105868?
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-9qpg-3cf8-w33x",
  "modified" : "2026-10-07T20:28:53Z",
  "published" : "2026-10-07T20:28:53Z",
  "aliases" : [ "CVE-2026-105868" ],
  "summary" : "Payload: Uploaded XML files could execute same-origin JavaScript",
  "details" : "### Impact\nUnder certain local upload configurations, an uploaded XML file and stylesheet could execute JavaScript in the Payload origin when a logged-in user opens the file.\n\nYou are affected if:\n- You accept XML uploads (accepted by default).\n\n### Patches\nUsers should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`.\n\n### Workarounds\nDisallow XML/XSL uploads.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "payload"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.90.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "payload"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0-canary.0"
      }, {
        "fixed" : "4.0.0-canary.34"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/security/advisories/GHSA-9qpg-3cf8-w33x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-105868"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/commit/a8c3a8e8e2680c96ec4f66f5b3854c5df6c35adf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/payloadcms/payload"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/releases/tag/v3.90.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T20:28:53Z",
    "nvd_published_at" : "2026-10-06T17:17:23Z"
  }
}