CVE-2026-34784: Parse server Parser Server's Streaming File Download Vulnerability

HIGH
Advisory Identifier: GHSA-hpm8-9qx6-jvwv
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CWE-285
Published
Advisory Summary

CVE-2026-34784 is a HIGH parser server's streaming file download vulnerability (CWE-285: Improper Authorization) affecting Parse server libraries in the npm ecosystem. The issue involves parser server's streaming file download bypasses afterfind file trigger authorization. Remediation is available by upgrading affected packages to version 9.7.1-alpha.1, 8.6.71.

CVE-2026-34784 at a Glance

CVE Identifier CVE-2026-34784
GHSA Identifier GHSA-hpm8-9qx6-jvwv
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-285: Improper Authorization
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-34784

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: 9.7.1-alpha.1 
npm install parse-server@9.7.1-alpha.1
parse-server fixed: 8.6.71 
npm install parse-server@8.6.71
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-2026-34784, 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 9.7.1-alpha.1), 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-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. 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 File downloads via HTTP Range requests bypass the `afterFind(Parse.File)` trigger and its validators on storage adapters that support streaming (e.g. the default GridFS adapter). This allows access to files that should be protected by `afterFind` trigger authorization logic or built-in validators such as `requireUser`. ### Patches The streaming file download path now executes the `afterFind(Parse.File)` trigger before sending any data. Authentication is resolved from the session token header so that trigger validators can distinguish authenticated from unauthenticated requests. ### Workarounds Use `beforeFind(Parse.File)` instead of `afterFind(Parse.File)` for file access authorization. The `beforeFind` trigger runs on all download paths including streaming.

CVE-2026-34784 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.7.1-alpha.18.6.71
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.7.1-alpha.1
9.7.1-alpha.1
parse-server
npm/parse-server
npm
< 8.6.71
8.6.71

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-hpm8-9qx6-jvwv
NVD — CVE-2026-34784 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34784
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10361
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10362
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/053109b3ee71815bc39ed84116c108ff9edbf337
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/a0b0c69fc44f87f80d793d257344e7dcbf676e22
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server

Frequently Asked Questions

What is CVE-2026-34784?
CVE-2026-34784 is a security vulnerability in Parse server involving Parser Server's streaming file download bypasses afterFind file trigger authorization under CWE-285: Improper Authorization.
Which Parse server versions are affected?
Affected versions include releases prior to 9.7.1-alpha.1, 8.6.71 across affected packages: parse-server.
What version fixes CVE-2026-34784?
Upgrading to 9.7.1-alpha.1, 8.6.71 (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 9.7.1-alpha.1, 8.6.71. Upgrade your dependency to 9.7.1-alpha.1, 8.6.71 or later.
What CWE is associated with CVE-2026-34784?
CVE-2026-34784 is classified under CWE-285: Improper Authorization (The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.).
How can I check npm dependencies for CVE-2026-34784?
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-hpm8-9qx6-jvwv",
  "modified" : "2026-04-01T23:09:14Z",
  "published" : "2026-04-01T23:09:14Z",
  "aliases" : [ "CVE-2026-34784" ],
  "summary" : "Parser Server's streaming file download bypasses afterFind file trigger authorization",
  "details" : "### Impact\n\nFile downloads via HTTP Range requests bypass the `afterFind(Parse.File)` trigger and its validators on storage adapters that support streaming (e.g. the default GridFS adapter). This allows access to files that should be protected by `afterFind` trigger authorization logic or built-in validators such as `requireUser`.\n\n### Patches\n\nThe streaming file download path now executes the `afterFind(Parse.File)` trigger before sending any data. Authentication is resolved from the session token header so that trigger validators can distinguish authenticated from unauthenticated requests.\n\n### Workarounds\n\nUse `beforeFind(Parse.File)` instead of `afterFind(Parse.File)` for file access authorization. The `beforeFind` trigger runs on all download paths including streaming.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/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" : "9.7.1-alpha.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "parse-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.6.71"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-hpm8-9qx6-jvwv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34784"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10361"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10362"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/053109b3ee71815bc39ed84116c108ff9edbf337"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/a0b0c69fc44f87f80d793d257344e7dcbf676e22"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-01T23:09:14Z",
    "nvd_published_at" : "2026-03-31T20:16:29Z"
  }
}