MEDIUM
GHSA-f6j3-w9v3-cq22
Parse Server has a session field immutability bypass via falsy-value guard
Details
### Impact
An authenticated user can bypass the immutability guard on session fields (`expiresAt`, `createdWith`) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies.
### Patches
The truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null.
### Workarounds
There is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.
Are you affected?
Enter the version of the package you're using.
Affected packages
npm / parse-server
Introduced in:
9.0.0 Fixed in: 9.7.0-alpha.14 Fix
npm install parse-server@9.7.0-alpha.14 References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22 [WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-34574 [ADVISORY]
- https://github.com/parse-community/parse-server/pull/10347 [WEB]
- https://github.com/parse-community/parse-server/pull/10348 [WEB]
- https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21 [WEB]
- https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777 [WEB]
- https://github.com/parse-community/parse-server [PACKAGE]