CVE-2026-32594: Parse server Parse Server's GraphQL WebSocket Endpoint Vulnerability

MODERATE
Advisory Identifier: GHSA-p2x3-8689-cwpg
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CWE-306
Published
Advisory Summary

CVE-2026-32594 is a MODERATE parse server's graphql websocket endpoint vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Parse server libraries in the npm ecosystem. The issue involves parse server's graphql websocket endpoint bypasses security middleware. Remediation is available by upgrading affected packages to version 9.6.0-alpha.14, 8.6.40.

CVE-2026-32594 at a Glance

CVE Identifier CVE-2026-32594
GHSA Identifier GHSA-p2x3-8689-cwpg
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-32594

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.14 
npm install parse-server@9.6.0-alpha.14
parse-server fixed: 8.6.40 
npm install parse-server@8.6.40
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-2026-32594, 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.14), 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-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. 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 Any Parse Server deployment that uses the GraphQL API is affected. The GraphQL WebSocket endpoint for subscriptions does not pass requests through the Express middleware chain that enforces authentication, introspection control, and query complexity limits. An attacker can connect to the WebSocket endpoint and execute GraphQL operations without providing a valid application or API key, access the GraphQL schema via introspection even when public introspection is disabled, and send arbitrarily complex queries that bypass configured complexity limits. ### Patches The unfinished GraphQL WebSocket subscription feature has been removed, including the `createSubscriptions` method and the `subscriptions-transport-ws` dependency. GraphQL subscriptions were never functional in Parse Server as the schema did not define any subscription types. ### Workarounds Block WebSocket upgrade requests to the GraphQL subscriptions path (by default `/subscriptions`) at the network level, for example using a reverse proxy or load balancer rule.

CVE-2026-32594 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.6.0-alpha.148.6.40
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.6.0-alpha.14
9.6.0-alpha.14
parse-server
npm/parse-server
npm
< 8.6.40
8.6.40

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-p2x3-8689-cwpg
NVD — CVE-2026-32594 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32594
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10189
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10190
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/21330d146c68b57a930a58b8a8cd9fbf09436cf3
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/3ffba757bfc836bd034e1369f4f64304e110e375

Frequently Asked Questions

What is CVE-2026-32594?
CVE-2026-32594 is a security vulnerability in Parse server involving Parse Server's GraphQL WebSocket endpoint bypasses security middleware under CWE-306: Missing Authentication for Critical Function.
Which Parse server versions are affected?
Affected versions include releases prior to 9.6.0-alpha.14, 8.6.40 across affected packages: parse-server.
What version fixes CVE-2026-32594?
Upgrading to 9.6.0-alpha.14, 8.6.40 (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.14, 8.6.40. Upgrade your dependency to 9.6.0-alpha.14, 8.6.40 or later.
What CWE is associated with CVE-2026-32594?
CVE-2026-32594 is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check npm dependencies for CVE-2026-32594?
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-p2x3-8689-cwpg",
  "modified" : "2026-09-25T14:19:32Z",
  "published" : "2026-03-13T20:04:44Z",
  "aliases" : [ "CVE-2026-32594" ],
  "summary" : "Parse Server's GraphQL WebSocket endpoint bypasses security middleware",
  "details" : "### Impact\n\nAny Parse Server deployment that uses the GraphQL API is affected. The GraphQL WebSocket endpoint for subscriptions does not pass requests through the Express middleware chain that enforces authentication, introspection control, and query complexity limits. An attacker can connect to the WebSocket endpoint and execute GraphQL operations without providing a valid application or API key, access the GraphQL schema via introspection even when public introspection is disabled, and send arbitrarily complex queries that bypass configured complexity limits.\n\n### Patches\n\nThe unfinished GraphQL WebSocket subscription feature has been removed, including the `createSubscriptions` method and the `subscriptions-transport-ws` dependency. GraphQL subscriptions were never functional in Parse Server as the schema did not define any subscription types.\n\n### Workarounds\n\nBlock WebSocket upgrade requests to the GraphQL subscriptions path (by default `/subscriptions`) at the network level, for example using a reverse proxy or load balancer rule.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.40"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-p2x3-8689-cwpg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32594"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10189"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10190"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/21330d146c68b57a930a58b8a8cd9fbf09436cf3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/3ffba757bfc836bd034e1369f4f64304e110e375"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-13T20:04:44Z",
    "nvd_published_at" : "2026-03-16T14:19:38Z"
  }
}