CVE-2026-32886: Parse server Parse Server's Cloud Function Dispatch Vulnerability

HIGH
Advisory Identifier: GHSA-4263-jgmp-7pf4
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CWE-1321
Published
Advisory Summary

CVE-2026-32886 is a HIGH parse server's cloud function dispatch vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Parse server libraries in the npm ecosystem. The issue involves parse server's cloud function dispatch crashes server via prototype chain traversal. Remediation is available by upgrading affected packages to version 9.6.0-alpha.24, 8.6.47.

CVE-2026-32886 at a Glance

CVE Identifier CVE-2026-32886
GHSA Identifier GHSA-4263-jgmp-7pf4
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-32886

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.24 
npm install parse-server@9.6.0-alpha.24
parse-server fixed: 8.6.47 
npm install parse-server@8.6.47
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-2026-32886, 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.24), 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-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. 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 Remote clients can crash the Parse Server process by calling a cloud function endpoint with a crafted function name that traverses the JavaScript prototype chain of a registered cloud function handler, causing a stack overflow. ### Patches The fix restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers. ### Workarounds There is no known workaround.

CVE-2026-32886 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.6.0-alpha.248.6.47
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.6.0-alpha.24
9.6.0-alpha.24
parse-server
npm/parse-server
npm
< 8.6.47
8.6.47

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4
NVD — CVE-2026-32886 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32886
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10210
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10211
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server

Frequently Asked Questions

What is CVE-2026-32886?
CVE-2026-32886 is a security vulnerability in Parse server involving Parse Server's Cloud function dispatch crashes server via prototype chain traversal under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Parse server versions are affected?
Affected versions include releases prior to 9.6.0-alpha.24, 8.6.47 across affected packages: parse-server.
What version fixes CVE-2026-32886?
Upgrading to 9.6.0-alpha.24, 8.6.47 (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.24, 8.6.47. Upgrade your dependency to 9.6.0-alpha.24, 8.6.47 or later.
What CWE is associated with CVE-2026-32886?
CVE-2026-32886 is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.).
How can I check npm dependencies for CVE-2026-32886?
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-4263-jgmp-7pf4",
  "modified" : "2026-03-19T21:12:40Z",
  "published" : "2026-03-17T17:58:08Z",
  "aliases" : [ "CVE-2026-32886" ],
  "summary" : "Parse Server's Cloud function dispatch crashes server via prototype chain traversal",
  "details" : "### Impact\n\nRemote clients can crash the Parse Server process by calling a cloud function endpoint with a crafted function name that traverses the JavaScript prototype chain of a registered cloud function handler, causing a stack overflow.\n\n### Patches\n\nThe fix restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers.\n\n### Workarounds\n\nThere is no known workaround.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.6.0-alpha.24"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.47"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32886"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10210"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10211"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-17T17:58:08Z",
    "nvd_published_at" : "2026-03-18T22:16:25Z"
  }
}