CVE-2026-32742
Description
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`.
How to fix
- parseplatform parse-server8.6.42, 9.6.0 or later
- parse-server9.6.0-alpha.17, 8.6.42 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| parseplatform parse-server | v < 8.6.42, 9.0.0 ≤ v < 9.6.0, 9.6.0 | 8.6.42, 9.6.0 |
| parse-servernpm | 9.0.0 ≤ v < 9.6.0-alpha.17, v < 8.6.42 | 9.6.0-alpha.17, 8.6.42 |
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