CVE-2026-33498: Parse server Parse Server Has A Query Vulnerability

HIGH
Advisory Identifier: GHSA-9fjp-q3c4-6w3j
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CVSS 7.5
CWE-674
Published
Advisory Summary

CVE-2026-33498 is a HIGH (CVSS 7.5) parse server has a query vulnerability (CWE-674: Uncontrolled Recursion) affecting Parse server libraries in the npm ecosystem. The issue involves parse server has a query condition depth bypass via pre-validation transform pipeline. Remediation is available by upgrading affected packages to version 9.6.0-alpha.44, 8.6.55.

CVE-2026-33498 at a Glance

CVE Identifier CVE-2026-33498
GHSA Identifier GHSA-9fjp-q3c4-6w3j
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-674: Uncontrolled Recursion
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

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

How to Fix CVE-2026-33498

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.44 
npm install parse-server@9.6.0-alpha.44
parse-server fixed: 8.6.55 
npm install parse-server@8.6.55
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-2026-33498, 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.44), 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-674: Uncontrolled Recursion, where the product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. 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 An attacker can send an unauthenticated HTTP request with a deeply nested query containing logical operators to permanently hang the Parse Server process. The server becomes completely unresponsive and must be manually restarted. This is a bypass of the fix for CVE-2026-32944. ### Patches The query condition nesting depth is now validated before the query enters the transformation pipeline, preventing deeply nested structures from being recursively processed before the existing depth guard can fire. ### Workarounds None.

CVE-2026-33498 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.6.0-alpha.448.6.55
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.6.0-alpha.44
9.6.0-alpha.44
parse-server
npm/parse-server
npm
< 8.6.55
8.6.55

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-9fjp-q3c4-6w3j
NVD — CVE-2026-33498 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33498
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10257
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10258
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/2581b5426047ce9cbcd3d9c0e8379e9c30e23ab5
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/85994eff9e7b34cac7e1a2f5791985022a1461d1
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server

Frequently Asked Questions

What is CVE-2026-33498?
CVE-2026-33498 is a security vulnerability in Parse server involving Parse Server has a query condition depth bypass via pre-validation transform pipeline under CWE-674: Uncontrolled Recursion.
Which Parse server versions are affected?
Affected versions include releases prior to 9.6.0-alpha.44, 8.6.55 across affected packages: parse-server.
What version fixes CVE-2026-33498?
Upgrading to 9.6.0-alpha.44, 8.6.55 (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.44, 8.6.55. Upgrade your dependency to 9.6.0-alpha.44, 8.6.55 or later.
What is the CVSS score of CVE-2026-33498?
CVE-2026-33498 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-33498?
CVE-2026-33498 is classified under CWE-674: Uncontrolled Recursion (The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.).
How can I check npm dependencies for CVE-2026-33498?
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-9fjp-q3c4-6w3j",
  "modified" : "2026-03-30T13:51:36Z",
  "published" : "2026-03-20T20:56:22Z",
  "aliases" : [ "CVE-2026-33498" ],
  "summary" : "Parse Server has a query condition depth bypass via pre-validation transform pipeline",
  "details" : "### Impact\n\nAn attacker can send an unauthenticated HTTP request with a deeply nested query containing logical operators to permanently hang the Parse Server process. The server becomes completely unresponsive and must be manually restarted. This is a bypass of the fix for CVE-2026-32944.\n\n### Patches\n\nThe query condition nesting depth is now validated before the query enters the transformation pipeline, preventing deeply nested structures from being recursively processed before the existing depth guard can fire.\n\n### Workarounds\n\nNone.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/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.44"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.55"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-9fjp-q3c4-6w3j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33498"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10257"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10258"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/2581b5426047ce9cbcd3d9c0e8379e9c30e23ab5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/85994eff9e7b34cac7e1a2f5791985022a1461d1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-674" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-20T20:56:22Z",
    "nvd_published_at" : "2026-03-24T19:16:54Z"
  }
}