CVE-2026-34574: Parse server Parse Server Has A Session Vulnerability

MODERATE
Advisory Identifier: GHSA-f6j3-w9v3-cq22
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CWE-697
Published
Advisory Summary

CVE-2026-34574 is a MODERATE parse server has a session vulnerability (CWE-697: Incorrect Comparison) affecting Parse server libraries in the npm ecosystem. The issue involves parse server has a session field immutability bypass via falsy-value guard. Remediation is available by upgrading affected packages to version 9.7.0-alpha.14, 8.6.69.

CVE-2026-34574 at a Glance

CVE Identifier CVE-2026-34574
GHSA Identifier GHSA-f6j3-w9v3-cq22
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-697: Incorrect Comparison
Affected Product Parse server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-34574

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: 9.7.0-alpha.14 
npm install parse-server@9.7.0-alpha.14
parse-server fixed: 8.6.69 
npm install parse-server@8.6.69
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-2026-34574, 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 9.7.0-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-697: Incorrect Comparison, where the product compares two entities in a security-relevant context, but the comparison is incorrect. 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 authenticated user can bypass the immutability guard on session fields (`expiresAt`, `createdWith`) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies. ### Patches The truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null. ### Workarounds There is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.

CVE-2026-34574 Affected Parse server Versions

2 component(s)
Fixed Versions:
9.7.0-alpha.148.6.69
Product / Package Ecosystem Affected Versions Fixed Version
parse-server
npm/parse-server
npm
≥ 9.0.0
< 9.7.0-alpha.14
9.7.0-alpha.14
parse-server
npm/parse-server
npm
< 8.6.69
8.6.69

References

GitHub Advisory / Wiki ADVISORY
https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22
NVD — CVE-2026-34574 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34574
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10347
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server/pull/10348
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21
Security Fix Commit FIX COMMIT
https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777
Parse server Source Repository REPOSITORY
https://github.com/parse-community/parse-server

Frequently Asked Questions

What is CVE-2026-34574?
CVE-2026-34574 is a security vulnerability in Parse server involving Parse Server has a session field immutability bypass via falsy-value guard under CWE-697: Incorrect Comparison.
Which Parse server versions are affected?
Affected versions include releases prior to 9.7.0-alpha.14, 8.6.69 across affected packages: parse-server.
What version fixes CVE-2026-34574?
Upgrading to 9.7.0-alpha.14, 8.6.69 (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 9.7.0-alpha.14, 8.6.69. Upgrade your dependency to 9.7.0-alpha.14, 8.6.69 or later.
What CWE is associated with CVE-2026-34574?
CVE-2026-34574 is classified under CWE-697: Incorrect Comparison (The product compares two entities in a security-relevant context, but the comparison is incorrect.).
How can I check npm dependencies for CVE-2026-34574?
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-f6j3-w9v3-cq22",
  "modified" : "2026-04-01T00:03:19Z",
  "published" : "2026-04-01T00:03:19Z",
  "aliases" : [ "CVE-2026-34574" ],
  "summary" : "Parse Server has a session field immutability bypass via falsy-value guard",
  "details" : "### Impact\n\nAn authenticated user can bypass the immutability guard on session fields (`expiresAt`, `createdWith`) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies.\n\n### Patches\n\nThe truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null.\n\n### Workarounds\n\nThere is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
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      "name" : "parse-server"
    },
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      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.7.0-alpha.14"
      } ]
    } ]
  }, {
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    },
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      "type" : "ECOSYSTEM",
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        "introduced" : "0"
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        "fixed" : "8.6.69"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22"
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    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34574"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10347"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/pull/10348"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/parse-community/parse-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-697" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-01T00:03:19Z",
    "nvd_published_at" : "2026-03-31T16:16:33Z"
  }
}