GitHub Advisoryadvisory · npm

GHSA-5v7g-9h8f-8pgg Parse Server session creation endpoint allows overwriting server-generated session fields

MEDIUM Published 2026-03-17 Modified 2026-03-19 Official page ↗
Aliases
CVE-2026-32742
Ecosystem
npm
Packages
parse-server
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-915
Reviewed
2026-03-17

Affected packages

• npm parse-server: >= 9.0.0, < 9.6.0-alpha.17 → fixed in 9.6.0-alpha.17 • npm parse-server: < 8.6.42 → fixed in 8.6.42

Description

Impact 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. Patches The session creation endpoint now filters out server-generated fields from user-supplied data, preventing them from being overwritten. Workarounds Add a `beforeSave` trigger on the `_Session` class to validate and reject or strip any user-supplied values for `sessionToken`, `expiresAt`, and `createdWith`.

Related

Alias · CVE (1)

  • CVE-2026-32742 Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. vulnerability

Weakness · CWE (1)

  • CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes weakness

References