CVE-2026-31872: Parse server Parse Server Has A Protected Vulnerability

HIGH
Advisory Identifier: GHSA-r2m8-pxm9-9c4g
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CWE-284
Published
Advisory Summary

CVE-2026-31872 is a HIGH parse server has a protected vulnerability (CWE-284: Improper Access Control) affecting Parse server libraries in the npm ecosystem. The issue involves parse server has a protected fields bypass via dot-notation in query and sort. Remediation is available by upgrading affected packages to version 9.6.0-alpha.6, 8.6.32.

CVE-2026-31872 at a Glance

CVE Identifier CVE-2026-31872
GHSA Identifier GHSA-r2m8-pxm9-9c4g
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-284: Improper Access Control
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-31872

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

parse-server fixed: 9.6.0-alpha.6 
npm install parse-server@9.6.0-alpha.6
parse-server fixed: 8.6.32 
npm install parse-server@8.6.32
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 parse-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-31872, inspect your project dependencies using npm:

npm ls parse-server

Analyze the terminal output to locate any version of Parse server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.6.0-alpha.6), your application is affected.

Note: The npm ls parse-server 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Parse server, 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 The `protectedFields` class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. ### Patches The fix ensures that query WHERE clause keys and sort keys are checked against protected fields by extracting the root field from dot-notation paths. For example, a query on `secretObj.apiKey` is now correctly blocked when `secretObj` is a protected field. ### Workarounds None. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.32

CVE-2026-31872 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.6.0-alpha.68.6.32
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0-alpha.1
< 9.6.0-alpha.6
9.6.0-alpha.6
parse-server
npm/parse-server
npm
< 8.6.32
8.6.32

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g
NVD — CVE-2026-31872 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31872
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server
Parse server Release RELEASE
https://github.com/parse-community/parse-server/releases/tag/8.6.32
Parse server Release RELEASE
https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6

Frequently Asked Questions

What is CVE-2026-31872?
CVE-2026-31872 is a security vulnerability in Parse server involving Parse Server has a protected fields bypass via dot-notation in query and sort under CWE-284: Improper Access Control.
Which Parse server versions are affected?
Affected versions include releases prior to 9.6.0-alpha.6, 8.6.32 across affected packages: parse-server.
What version fixes CVE-2026-31872?
Upgrading to 9.6.0-alpha.6, 8.6.32 (or the latest patched release for your respective branch) resolves the vulnerability.
Is parse-server affected?
Yes, parse-server is affected in releases prior to 9.6.0-alpha.6, 8.6.32. Upgrade your dependency to 9.6.0-alpha.6, 8.6.32 or later.
What CWE is associated with CVE-2026-31872?
CVE-2026-31872 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check npm dependencies for CVE-2026-31872?
Run the dependency tree command: 'npm ls parse-server'. 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-r2m8-pxm9-9c4g",
  "modified" : "2026-03-11T20:57:48Z",
  "published" : "2026-03-11T00:34:59Z",
  "aliases" : [ "CVE-2026-31872" ],
  "summary" : "Parse Server has a protected fields bypass via dot-notation in query and sort",
  "details" : "### Impact\n\nThe `protectedFields` class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values.\n\nThis affects both MongoDB and PostgreSQL deployments.\n\n### Patches\n\nThe fix ensures that query WHERE clause keys and sort keys are checked against protected fields by extracting the root field from dot-notation paths. For example, a query on `secretObj.apiKey` is now correctly blocked when `secretObj` is a protected field.\n\n### Workarounds\n\nNone.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.32",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
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    },
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      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
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    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
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  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31872"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/8.6.32"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-11T00:34:59Z",
    "nvd_published_at" : "2026-03-11T18:16:26Z"
  }
}