CVE-2026-32242: Parse server Parse Server's OAuth2 Adapter Shares Vulnerability

CRITICAL
Advisory Identifier: GHSA-2cjm-2gwv-m892
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CWE-362
Published
Advisory Summary

CVE-2026-32242 is a CRITICAL parse server's oauth2 adapter shares vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Parse server libraries in the npm ecosystem. The issue involves parse server's oauth2 adapter shares mutable state across providers via singleton instance. Remediation is available by upgrading affected packages to version 9.6.0-alpha.11, 8.6.37.

CVE-2026-32242 at a Glance

CVE Identifier CVE-2026-32242
GHSA Identifier GHSA-2cjm-2gwv-m892
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-32242

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.11 
npm install parse-server@9.6.0-alpha.11
parse-server fixed: 8.6.37 
npm install parse-server@8.6.37
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-2026-32242, 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.11), 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-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. 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 Parse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all OAuth2 provider configurations. Under concurrent authentication requests for different OAuth2 providers, one provider's token validation may execute using another provider's configuration, potentially allowing a token that should be rejected by one provider to be accepted because it is validated against a different provider's policy. Deployments that configure multiple OAuth2 providers via the `oauth2: true` flag are affected. ### Patches The fix ensures that a new adapter instance is created for each provider instead of reusing the singleton, so each provider's configuration is isolated. ### Workarounds There is no known workaround. If only a single OAuth2 provider is configured, the race condition cannot occur. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-2cjm-2gwv-m892 - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.11 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.37

CVE-2026-32242 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.6.0-alpha.118.6.37
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.6.0-alpha.11
9.6.0-alpha.11
parse-server
npm/parse-server
npm
< 8.6.37
8.6.37

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-2cjm-2gwv-m892
NVD — CVE-2026-32242 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32242
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/8.6.37
Parse server Release RELEASE
https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.11

Frequently Asked Questions

What is CVE-2026-32242?
CVE-2026-32242 is a security vulnerability in Parse server involving Parse Server's OAuth2 adapter shares mutable state across providers via singleton instance under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Parse server versions are affected?
Affected versions include releases prior to 9.6.0-alpha.11, 8.6.37 across affected packages: parse-server.
What version fixes CVE-2026-32242?
Upgrading to 9.6.0-alpha.11, 8.6.37 (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.11, 8.6.37. Upgrade your dependency to 9.6.0-alpha.11, 8.6.37 or later.
What CWE is associated with CVE-2026-32242?
CVE-2026-32242 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check npm dependencies for CVE-2026-32242?
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-2cjm-2gwv-m892",
  "modified" : "2026-03-13T13:36:09Z",
  "published" : "2026-03-12T17:29:49Z",
  "aliases" : [ "CVE-2026-32242" ],
  "summary" : "Parse Server's OAuth2 adapter shares mutable state across providers via singleton instance",
  "details" : "### Impact\n\nParse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all OAuth2 provider configurations. Under concurrent authentication requests for different OAuth2 providers, one provider's token validation may execute using another provider's configuration, potentially allowing a token that should be rejected by one provider to be accepted because it is validated against a different provider's policy.\n\nDeployments that configure multiple OAuth2 providers via the `oauth2: true` flag are affected.\n\n### Patches\n\nThe fix ensures that a new adapter instance is created for each provider instead of reusing the singleton, so each provider's configuration is isolated.\n\n### Workarounds\n\nThere is no known workaround. If only a single OAuth2 provider is configured, the race condition cannot occur.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-2cjm-2gwv-m892\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.11\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.37",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/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.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.37"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-2cjm-2gwv-m892"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32242"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/8.6.37"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-12T17:29:49Z",
    "nvd_published_at" : "2026-03-12T19:16:19Z"
  }
}