CVE-2026-39381: Parse server Parse Server's Endpoint `/sessions/me` Bypasses Vulnerability

MODERATE
Advisory Identifier: GHSA-g4v2-qx3q-4p64
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CVSS 4.3
CWE-863
Published
Advisory Summary

CVE-2026-39381 is a MODERATE (CVSS 4.3) parse server's endpoint `/sessions/me` bypasses vulnerability (CWE-863: Incorrect Authorization) affecting Parse server libraries in the npm ecosystem. The issue involves parse server's endpoint `/sessions/me` bypasses `_session` `protectedfields`. Remediation is available by upgrading affected packages to version 9.8.0-alpha.7, 8.6.75.

CVE-2026-39381 at a Glance

CVE Identifier CVE-2026-39381
GHSA Identifier GHSA-g4v2-qx3q-4p64
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-39381

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: 9.8.0-alpha.7 
npm install parse-server@9.8.0-alpha.7
parse-server fixed: 8.6.75 
npm install parse-server@8.6.75
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-2026-39381, 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 9.8.0-alpha.7), 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. 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 `GET /sessions/me` endpoint returns `_Session` fields that the server operator explicitly configured as protected via the `protectedFields` server option. Any authenticated user can retrieve their own session's protected fields with a single request. The equivalent `GET /sessions` and `GET /sessions/:objectId` endpoints correctly strip protected fields. ### Patches The `GET /sessions/me` handler now re-fetches the session with the caller's auth context after validating the session token, ensuring `protectedFields` and CLP apply consistently with other session endpoints. ### Workarounds None. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-g4v2-qx3q-4p64 - Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10406 - Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10407

CVE-2026-39381 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.8.0-alpha.78.6.75
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.8.0-alpha.7
9.8.0-alpha.7
parse-server
npm/parse-server
npm
≥ 7.0.0
< 8.6.75
8.6.75

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-g4v2-qx3q-4p64
NVD — CVE-2026-39381 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39381
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10406
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10407
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server

Frequently Asked Questions

What is CVE-2026-39381?
CVE-2026-39381 is a security vulnerability in Parse server involving Parse Server's Endpoint `/sessions/me` bypasses `_Session` `protectedFields` under CWE-863: Incorrect Authorization.
Which Parse server versions are affected?
Affected versions include releases prior to 9.8.0-alpha.7, 8.6.75 across affected packages: parse-server.
What version fixes CVE-2026-39381?
Upgrading to 9.8.0-alpha.7, 8.6.75 (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 9.8.0-alpha.7, 8.6.75. Upgrade your dependency to 9.8.0-alpha.7, 8.6.75 or later.
What is the CVSS score of CVE-2026-39381?
CVE-2026-39381 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-39381?
CVE-2026-39381 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check npm dependencies for CVE-2026-39381?
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-g4v2-qx3q-4p64",
  "modified" : "2026-04-15T21:17:24Z",
  "published" : "2026-04-08T00:14:50Z",
  "aliases" : [ "CVE-2026-39381" ],
  "summary" : "Parse Server's Endpoint `/sessions/me` bypasses `_Session` `protectedFields`",
  "details" : "### Impact\n\nThe `GET /sessions/me` endpoint returns `_Session` fields that the server operator explicitly configured as protected via the `protectedFields` server option. Any authenticated user can retrieve their own session's protected fields with a single request. The equivalent `GET /sessions` and `GET /sessions/:objectId` endpoints correctly strip protected fields.\n\n### Patches\n\nThe `GET /sessions/me` handler now re-fetches the session with the caller's auth context after validating the session token, ensuring `protectedFields` and CLP apply consistently with other session endpoints.\n\n### Workarounds\n\nNone.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-g4v2-qx3q-4p64\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10406\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10407",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.8.0-alpha.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "8.6.75"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-g4v2-qx3q-4p64"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-39381"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10406"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10407"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-08T00:14:50Z",
    "nvd_published_at" : "2026-04-07T20:16:32Z"
  }
}