GHSA-f6j3-w9v3-cq22Medium
Parse Server has a session field immutability bypass via falsy-value guard
🔗 CVE IDs covered (1)
📋 Description
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.
🎯 Affected products2
- npm/parse-server:>= 9.0.0, < 9.7.0-alpha.14
- npm/parse-server:< 8.6.69
🔗 References (7)
- https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22
- https://nvd.nist.gov/vuln/detail/CVE-2026-34574
- https://github.com/parse-community/parse-server/pull/10347
- https://github.com/parse-community/parse-server/pull/10348
- https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21
- https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777
- https://github.com/advisories/GHSA-f6j3-w9v3-cq22