CVE-2026-32742 Parse Server session creation endpoint allows overwriting server-generated session fields
Authenticated users can overwrite server-generated session fields to bypass expiration policies and predict tokens, enabling session hijacking.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32742?
CVE-2026-32742 is a medium-severity vulnerability in Parseplatform Parse-Server, published on 18 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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`.
Weakness: CWE-915
Which versions are affected by CVE-2026-32742?
5 open source packages ship an affected version, including parse-server and parse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | All versions | 8.6.42 |
parse-server npm | All versions | 8.6.42 |
parse-server npm | From 9.0.0 | 9.6.0-alpha.17 |
parse-server npm | From 9.0.0 | 9.6.0-alpha.17 |
parse Bitnami | All versions | 8.6.42, 9.6.0 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-32742?
Upgrade parse-server to a fixed version for your release line: 8.6.42 or 9.6.0-alpha.17.
Is CVE-2026-32742 being exploited?
There is no known exploitation of CVE-2026-32742 in the wild and no public exploit code.
Other vulnerabilities in Parseplatform Parse-Server
- CVE-2026-30966 Parse Server role escalation and CLP bypass via direct `_Join` table write
- CVE-2024-27298 Parse Server literalizeRegexPart SQL Injection
- CVE-2022-24760 Command Injection in Parse server
- CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
- CVE-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Sources
Also known as BIT-parse-2026-32742, GHSA-5v7g-9h8f-8pgg.