CVE-2026-32742
MEDIUM4.3EPSS 0.02%Parse Server session creation endpoint allows overwriting server-generated session fields
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`.
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.42, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0, < 9.6.0-alpha.17
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-32742
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/pull/10195
- WEBhttps://github.com/parse-community/parse-server/pull/10196
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-5v7g-9h8f-8pgg