CVE-2026-106100: Payload Field-level Write Access Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-4ww4-68q3-h7g5
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CVSS 7.1
CWE-639 CWE-915
Published
Advisory Summary

CVE-2026-106100 is a HIGH (CVSS 7.1) field-level write access bypass vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Payload libraries in the npm ecosystem. The issue involves field-level write access bypass in payload on mongodb. Remediation is available by upgrading affected packages to version 3.87.0, 4.0.0-canary.20.

CVE-2026-106100 at a Glance

CVE Identifier CVE-2026-106100
GHSA Identifier GHSA-4ww4-68q3-h7g5
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Payload
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.1

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

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

How to Fix CVE-2026-106100

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.

@payloadcms/db-mongodb fixed: 3.87.0 
npm install @payloadcms/db-mongodb@3.87.0
@payloadcms/db-mongodb fixed: 4.0.0-canary.20 
npm install @payloadcms/db-mongodb@4.0.0-canary.20
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 @payloadcms/db-mongodb

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-106100, inspect your project dependencies using npm:

npm ls @payloadcms/db-mongodb

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 3.87.0), your application is affected.

Note: The npm ls @payloadcms/db-mongodb 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. 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 vulnerability in field-level access control could allow an authenticated user to modify fields they are not permitted to change on documents they can otherwise update. You are affected if: Payload version < `3.87.0` (or a `4.0.0-canary` release before `4.0.0-canary.20`) using the MongoDB adapter (`@payloadcms/db-mongodb`) with any collection that relies on field-level access control to restrict writes under certain conditions. Relational adapters (Postgres, SQLite) are not affected. ### Patches Handling of incoming field data has been hardened so field-level access control is enforced consistently. Users should upgrade to `3.87.0` (or `4.0.0-canary.20` on the `4.x` line) or later. ### Workarounds There is no complete workaround. Upgrading to `3.87.0` (or `4.0.0-canary.20` on the `4.x` line) is recommended.

CVE-2026-106100 Affected Payload Versions

2 component(s)
Fixed Versions:
3.87.04.0.0-canary.20
Product / Package Ecosystem Affected Versions Fixed Version
@payloadcms/db-mongodb
npm/@payloadcms/db-mongodb
npm
< 3.87.0
3.87.0
@payloadcms/db-mongodb
npm/@payloadcms/db-mongodb
npm
≥ 4.0.0-canary.0
< 4.0.0-canary.20
4.0.0-canary.20

References

GitHub Advisory / Wiki ADVISORY
https://github.com/payloadcms/payload/security/advisories/GHSA-4ww4-68q3-h7g5
NVD — CVE-2026-106100 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106100
Security Fix Commit FIX COMMIT
https://github.com/payloadcms/payload/commit/2a69863deb0e3c87e36c1b3b17ab2d5b02fcb941
Security Fix Commit FIX COMMIT
https://github.com/payloadcms/payload/commit/8f77dffa9552885ec2710768cfee15b57e389935
Payload Source Repository REPOSITORY
https://github.com/payloadcms/payload
Payload Release RELEASE
https://github.com/payloadcms/payload/releases/tag/v3.87.0

Frequently Asked Questions

What is CVE-2026-106100?
CVE-2026-106100 is a security vulnerability in Payload involving Field-level write access bypass in Payload on MongoDB under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Payload versions are affected?
Affected versions include releases prior to 3.87.0, 4.0.0-canary.20 across affected packages: @payloadcms/db-mongodb.
What version fixes CVE-2026-106100?
Upgrading to 3.87.0, 4.0.0-canary.20 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @payloadcms/db-mongodb affected?
Yes, @payloadcms/db-mongodb is affected in releases prior to 3.87.0, 4.0.0-canary.20. Upgrade your dependency to 3.87.0, 4.0.0-canary.20 or later.
What is the CVSS score of CVE-2026-106100?
CVE-2026-106100 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N.
What CWE is associated with CVE-2026-106100?
CVE-2026-106100 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check npm dependencies for CVE-2026-106100?
Run the dependency tree command: 'npm ls @payloadcms/db-mongodb'. 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-4ww4-68q3-h7g5",
  "modified" : "2026-10-07T16:19:57Z",
  "published" : "2026-10-07T16:19:57Z",
  "aliases" : [ "CVE-2026-106100" ],
  "summary" : "Payload: Field-level write access bypass in Payload on MongoDB",
  "details" : "### Impact\nA vulnerability in field-level access control could allow an authenticated user to modify fields they are not permitted to change on documents they can otherwise update.\n\nYou are affected if:\nPayload version < `3.87.0` (or a `4.0.0-canary` release before `4.0.0-canary.20`) using the MongoDB adapter (`@payloadcms/db-mongodb`) with any collection that relies on field-level access control to restrict writes under certain conditions.\n\nRelational adapters (Postgres, SQLite) are not affected.\n\n### Patches\nHandling of incoming field data has been hardened so field-level access control is enforced consistently.\n\nUsers should upgrade to `3.87.0` (or `4.0.0-canary.20` on the `4.x` line) or later.\n\n### Workarounds\nThere is no complete workaround. Upgrading to `3.87.0` (or `4.0.0-canary.20` on the `4.x` line) is recommended.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@payloadcms/db-mongodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.87.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@payloadcms/db-mongodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0-canary.0"
      }, {
        "fixed" : "4.0.0-canary.20"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/security/advisories/GHSA-4ww4-68q3-h7g5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-106100"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/commit/2a69863deb0e3c87e36c1b3b17ab2d5b02fcb941"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/commit/8f77dffa9552885ec2710768cfee15b57e389935"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/payloadcms/payload"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/payloadcms/payload/releases/tag/v3.87.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639", "CWE-915" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T16:19:57Z",
    "nvd_published_at" : "2026-10-06T17:17:23Z"
  }
}