CVE-2026-32742

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.17 and 8.6.42, an authenticated user can overwrite server-generated session fields (`sessionToken`, `expiresAt`, `createdWith`) when creating a session object via `POST /classes/_Session`. This allows bypassing the server's session expiration policy by setting an arbitrary far-future expiration date. It also allows setting a predictable session token value. Starting in version 9.6.0-alpha.17 and 8.6.42, the session creation endpoint filters out server-generated fields from user-supplied data, preventing them from being overwritten. As a workaround, add a `beforeSave` trigger on the `_Session` class to validate and reject or strip any user-supplied values for `sessionToken`, `expiresAt`, and `createdWith`.

• CWE-915

• https://github.com/parse-community/parse-server/pull/10195Issue Tracking
• https://github.com/parse-community/parse-server/pull/10196Issue Tracking
• https://github.com/parse-community/parse-server/security/advisories/GHSA-5v7g-9h8f-8pggVendor Advisory

Published

Mar 18, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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